Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa

Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Aishatu M. Nalado [verfasserIn] Gbenga Olorunfemi [verfasserIn] Therese Dix-Peek [verfasserIn] Caroline Dickens [verfasserIn] Lungile Khambule [verfasserIn] Tracy Snyman [verfasserIn] Graham Paget [verfasserIn] Johnny Mahlangu [verfasserIn] Raquel Duarte [verfasserIn] Jaya George [verfasserIn] Saraladevi Naicker [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	Absolute iron deficiency Chronic kidney disease Diagnostic test Functional iron deficiency GDF-15 Hepcidin

Übergeordnetes Werk:	In: BMC Nephrology - BMC, 2003, 21(2020), 1, Seite 10
Übergeordnetes Werk:	volume:21 ; year:2020 ; number:1 ; pages:10

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1186/s12882-020-02046-7

Katalog-ID:	DOAJ04397712X

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245	1	0	\|a Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa
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520			\|a Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients.
650		4	\|a Absolute iron deficiency
650		4	\|a Chronic kidney disease
650		4	\|a Diagnostic test
650		4	\|a Functional iron deficiency
650		4	\|a GDF-15
650		4	\|a Hepcidin
653		0	\|a Diseases of the genitourinary system. Urology
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author_variant	a m n amn g o go t d p tdp c d cd l k lk t s ts g p gp j m jm r d rd j g jg s n sn
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allfields	10.1186/s12882-020-02046-7 doi (DE-627)DOAJ04397712X (DE-599)DOAJcbd015fb4d164d819802d531810b0b0d DE-627 ger DE-627 rakwb eng RC870-923 Aishatu M. Nalado verfasserin aut Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients. Absolute iron deficiency Chronic kidney disease Diagnostic test Functional iron deficiency GDF-15 Hepcidin Diseases of the genitourinary system. Urology Gbenga Olorunfemi verfasserin aut Therese Dix-Peek verfasserin aut Caroline Dickens verfasserin aut Lungile Khambule verfasserin aut Tracy Snyman verfasserin aut Graham Paget verfasserin aut Johnny Mahlangu verfasserin aut Raquel Duarte verfasserin aut Jaya George verfasserin aut Saraladevi Naicker verfasserin aut In BMC Nephrology BMC, 2003 21(2020), 1, Seite 10 (DE-627)326643672 (DE-600)2041348-8 14712369 nnns volume:21 year:2020 number:1 pages:10 https://doi.org/10.1186/s12882-020-02046-7 kostenfrei https://doaj.org/article/cbd015fb4d164d819802d531810b0b0d kostenfrei http://link.springer.com/article/10.1186/s12882-020-02046-7 kostenfrei https://doaj.org/toc/1471-2369 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 21 2020 1 10
spelling	10.1186/s12882-020-02046-7 doi (DE-627)DOAJ04397712X (DE-599)DOAJcbd015fb4d164d819802d531810b0b0d DE-627 ger DE-627 rakwb eng RC870-923 Aishatu M. Nalado verfasserin aut Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients. Absolute iron deficiency Chronic kidney disease Diagnostic test Functional iron deficiency GDF-15 Hepcidin Diseases of the genitourinary system. Urology Gbenga Olorunfemi verfasserin aut Therese Dix-Peek verfasserin aut Caroline Dickens verfasserin aut Lungile Khambule verfasserin aut Tracy Snyman verfasserin aut Graham Paget verfasserin aut Johnny Mahlangu verfasserin aut Raquel Duarte verfasserin aut Jaya George verfasserin aut Saraladevi Naicker verfasserin aut In BMC Nephrology BMC, 2003 21(2020), 1, Seite 10 (DE-627)326643672 (DE-600)2041348-8 14712369 nnns volume:21 year:2020 number:1 pages:10 https://doi.org/10.1186/s12882-020-02046-7 kostenfrei https://doaj.org/article/cbd015fb4d164d819802d531810b0b0d kostenfrei http://link.springer.com/article/10.1186/s12882-020-02046-7 kostenfrei https://doaj.org/toc/1471-2369 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 21 2020 1 10
allfields_unstemmed	10.1186/s12882-020-02046-7 doi (DE-627)DOAJ04397712X (DE-599)DOAJcbd015fb4d164d819802d531810b0b0d DE-627 ger DE-627 rakwb eng RC870-923 Aishatu M. Nalado verfasserin aut Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients. Absolute iron deficiency Chronic kidney disease Diagnostic test Functional iron deficiency GDF-15 Hepcidin Diseases of the genitourinary system. Urology Gbenga Olorunfemi verfasserin aut Therese Dix-Peek verfasserin aut Caroline Dickens verfasserin aut Lungile Khambule verfasserin aut Tracy Snyman verfasserin aut Graham Paget verfasserin aut Johnny Mahlangu verfasserin aut Raquel Duarte verfasserin aut Jaya George verfasserin aut Saraladevi Naicker verfasserin aut In BMC Nephrology BMC, 2003 21(2020), 1, Seite 10 (DE-627)326643672 (DE-600)2041348-8 14712369 nnns volume:21 year:2020 number:1 pages:10 https://doi.org/10.1186/s12882-020-02046-7 kostenfrei https://doaj.org/article/cbd015fb4d164d819802d531810b0b0d kostenfrei http://link.springer.com/article/10.1186/s12882-020-02046-7 kostenfrei https://doaj.org/toc/1471-2369 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 21 2020 1 10
allfieldsGer	10.1186/s12882-020-02046-7 doi (DE-627)DOAJ04397712X (DE-599)DOAJcbd015fb4d164d819802d531810b0b0d DE-627 ger DE-627 rakwb eng RC870-923 Aishatu M. Nalado verfasserin aut Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients. Absolute iron deficiency Chronic kidney disease Diagnostic test Functional iron deficiency GDF-15 Hepcidin Diseases of the genitourinary system. Urology Gbenga Olorunfemi verfasserin aut Therese Dix-Peek verfasserin aut Caroline Dickens verfasserin aut Lungile Khambule verfasserin aut Tracy Snyman verfasserin aut Graham Paget verfasserin aut Johnny Mahlangu verfasserin aut Raquel Duarte verfasserin aut Jaya George verfasserin aut Saraladevi Naicker verfasserin aut In BMC Nephrology BMC, 2003 21(2020), 1, Seite 10 (DE-627)326643672 (DE-600)2041348-8 14712369 nnns volume:21 year:2020 number:1 pages:10 https://doi.org/10.1186/s12882-020-02046-7 kostenfrei https://doaj.org/article/cbd015fb4d164d819802d531810b0b0d kostenfrei http://link.springer.com/article/10.1186/s12882-020-02046-7 kostenfrei https://doaj.org/toc/1471-2369 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 21 2020 1 10
allfieldsSound	10.1186/s12882-020-02046-7 doi (DE-627)DOAJ04397712X (DE-599)DOAJcbd015fb4d164d819802d531810b0b0d DE-627 ger DE-627 rakwb eng RC870-923 Aishatu M. Nalado verfasserin aut Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients. Absolute iron deficiency Chronic kidney disease Diagnostic test Functional iron deficiency GDF-15 Hepcidin Diseases of the genitourinary system. Urology Gbenga Olorunfemi verfasserin aut Therese Dix-Peek verfasserin aut Caroline Dickens verfasserin aut Lungile Khambule verfasserin aut Tracy Snyman verfasserin aut Graham Paget verfasserin aut Johnny Mahlangu verfasserin aut Raquel Duarte verfasserin aut Jaya George verfasserin aut Saraladevi Naicker verfasserin aut In BMC Nephrology BMC, 2003 21(2020), 1, Seite 10 (DE-627)326643672 (DE-600)2041348-8 14712369 nnns volume:21 year:2020 number:1 pages:10 https://doi.org/10.1186/s12882-020-02046-7 kostenfrei https://doaj.org/article/cbd015fb4d164d819802d531810b0b0d kostenfrei http://link.springer.com/article/10.1186/s12882-020-02046-7 kostenfrei https://doaj.org/toc/1471-2369 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 21 2020 1 10
language	English
source	In BMC Nephrology 21(2020), 1, Seite 10 volume:21 year:2020 number:1 pages:10
sourceStr	In BMC Nephrology 21(2020), 1, Seite 10 volume:21 year:2020 number:1 pages:10
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Absolute iron deficiency Chronic kidney disease Diagnostic test Functional iron deficiency GDF-15 Hepcidin Diseases of the genitourinary system. Urology
isfreeaccess_bool	true
container_title	BMC Nephrology
authorswithroles_txt_mv	Aishatu M. Nalado @@aut@@ Gbenga Olorunfemi @@aut@@ Therese Dix-Peek @@aut@@ Caroline Dickens @@aut@@ Lungile Khambule @@aut@@ Tracy Snyman @@aut@@ Graham Paget @@aut@@ Johnny Mahlangu @@aut@@ Raquel Duarte @@aut@@ Jaya George @@aut@@ Saraladevi Naicker @@aut@@
publishDateDaySort_date	2020-01-01T00:00:00Z
hierarchy_top_id	326643672
id	DOAJ04397712X
language_de	englisch
fullrecord	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ04397712X</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230308075213.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230227s2020 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1186/s12882-020-02046-7</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ04397712X</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJcbd015fb4d164d819802d531810b0b0d</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">RC870-923</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Aishatu M. Nalado</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2020</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Absolute iron deficiency</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Chronic kidney disease</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Diagnostic test</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Functional iron deficiency</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">GDF-15</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Hepcidin</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Diseases of the genitourinary system. 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callnumber-first	R - Medicine
author	Aishatu M. Nalado
spellingShingle	Aishatu M. Nalado misc RC870-923 misc Absolute iron deficiency misc Chronic kidney disease misc Diagnostic test misc Functional iron deficiency misc GDF-15 misc Hepcidin misc Diseases of the genitourinary system. Urology Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa
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topic_title	RC870-923 Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa Absolute iron deficiency Chronic kidney disease Diagnostic test Functional iron deficiency GDF-15 Hepcidin
topic	misc RC870-923 misc Absolute iron deficiency misc Chronic kidney disease misc Diagnostic test misc Functional iron deficiency misc GDF-15 misc Hepcidin misc Diseases of the genitourinary system. Urology
topic_unstemmed	misc RC870-923 misc Absolute iron deficiency misc Chronic kidney disease misc Diagnostic test misc Functional iron deficiency misc GDF-15 misc Hepcidin misc Diseases of the genitourinary system. Urology
topic_browse	misc RC870-923 misc Absolute iron deficiency misc Chronic kidney disease misc Diagnostic test misc Functional iron deficiency misc GDF-15 misc Hepcidin misc Diseases of the genitourinary system. Urology
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title	Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa
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title_full	Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa
author_sort	Aishatu M. Nalado
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author_browse	Aishatu M. Nalado Gbenga Olorunfemi Therese Dix-Peek Caroline Dickens Lungile Khambule Tracy Snyman Graham Paget Johnny Mahlangu Raquel Duarte Jaya George Saraladevi Naicker
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title_sort	hepcidin and gdf-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in south africa
callnumber	RC870-923
title_auth	Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa
abstract	Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients.
abstractGer	Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients.
abstract_unstemmed	Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. Conclusion Serum GDF-15 is a potential biomarker of absolute IDA, while hepcidin levels can predict functional IDA among CKD patients.
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title_short	Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa
url	https://doi.org/10.1186/s12882-020-02046-7 https://doaj.org/article/cbd015fb4d164d819802d531810b0b0d http://link.springer.com/article/10.1186/s12882-020-02046-7 https://doaj.org/toc/1471-2369
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Nalado</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2020</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Background Anaemia is a common presenting feature among patients with chronic kidney disease (CKD) and it is associated with poor clinical outcomes and quality of life. It is not clear if growth differentiation factor-15 (GDF-15) or hepcidin are useful as early markers of iron deficiency anaemia (IDA) among non-dialysis CKD patients. We therefore evaluated the diagnostic validity of GDF-15 and hepcidin as biomarkers of IDA among non-dialysis CKD patients in Johannesburg, South Africa. Method An analytic cross-sectional study was conducted among non-dialysis CKD patients (n = 312) and apparently healthy controls (n = 184) from June to December 2016 at an Academic Hospital, in Johannesburg, South Africa. An interviewer administered proforma was used to obtain the socio-biological and clinical characteristics of the participants. Serum levels of GDF-15 and hepcidin were determined. Predictive logistic regression models were built and post estimation receiver operator characteristics were determined to evaluate diagnostic validity of hepcidin and GDF-15 for absolute and functional iron deficiency anaemia. Results About half (50.6%) of the participants were female while the participants’ mean age was 49.7 ± 15.8 years. The predictive value of diagnosing absolute IDA among CKD patients using GDF-15 was 74.02% (95% CI: 67.62–80.42%) while the predictive value of diagnosing functional IDA among CKD patients using hepcidin was 70.1% (95% CI: 62.79–77.49%).There was a weak negative correlation between hepcidin levels and GFR (r = − 0.19, p = 0.04) in anaemic CKD patients, and between serum GDF-15 and haemoglobin (r = − 0.34, p = 0.001). Serum ferritin (β = 0.00389, P-value< 0.001), was a predictor of log hepcidin. MCHC (β = − 0.0220, P-value 0.005) and CKD stage (β = 0.4761, P-value < 0.001), race (β = 0.3429, P-value = 0.018) were predictors of log GDF-15. Both GDF-15 (adj OR: 1.0003, 95%CI: 1.0001–1.0005, P = 0.017) and hepcidin (adj OR: 1.003, 95%CI: 1.0004–1.0055, P = 0.023) were associated with iron deficiency anaemia after multiple linear regression modelling. 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Hepcidin and GDF-15 are potential biomarkers of iron deficiency anaemia in chronic kidney disease patients in South Africa

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