Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach

Background Little research has assessed the degree of severity and ordering of different types of sexual behaviors for HIV/STI infection in a measurement scale. The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex wi...
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Autor*in:	Li, Jian [verfasserIn] Liu, Hongjie Liu, Hui Feng, Tiejian Cai, Yumao

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2011

Schlagwörter:	Sexual Behavior Sexual Risk Sexual Risk Behavior Risky Sexual Behavior Item Difficulty

Anmerkung:	© Li et al; licensee BioMed Central Ltd. 2011

Übergeordnetes Werk:	Enthalten in: BMC public health - London : BioMed Central, 2001, 11(2011), 1 vom: 05. Okt.
Übergeordnetes Werk:	volume:11 ; year:2011 ; number:1 ; day:05 ; month:10

Links:	Volltext

DOI / URN:	10.1186/1471-2458-11-763

Katalog-ID:	SPR027860973

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245	1	0	\|a Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach
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520			\|a Background Little research has assessed the degree of severity and ordering of different types of sexual behaviors for HIV/STI infection in a measurement scale. The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex with men (MSM). Methods A cross-sectional study using respondent driven sampling was conducted among 351 MSM in Shenzhen, China. The Rasch model was used to examine the psychometric properties of an HIV/STI sexual risk scale including nine types of sexual behaviors. Results The Rasch analysis of the nine items met the unidimensionality and local independence assumption. Although the person reliability was low at 0.35, the item reliability was high at 0.99. The fit statistics provided acceptable infit and outfit values. Item difficulty invariance analysis showed that the item estimates of the risk behavior items were invariant (within error). Conclusions The findings suggest that the Rasch model can be utilized for measuring the level of sexual risk for HIV/STI infection as a single latent construct and for establishing the relative degree of severity of each type of sexual behavior in HIV/STI transmission and acquisition among MSM. The measurement scale provides a useful measurement tool to inform, design and evaluate behavioral interventions for HIV/STI infection among MSM.
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author_variant	j l jl h l hl h l hl t f tf y c yc
matchkey_str	article:14712458:2011----::scoercsesetfisieulikclaogsa
hierarchy_sort_str	2011
publishDate	2011
allfields	10.1186/1471-2458-11-763 doi (DE-627)SPR027860973 (SPR)1471-2458-11-763-e DE-627 ger DE-627 rakwb eng Li, Jian verfasserin aut Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Li et al; licensee BioMed Central Ltd. 2011 Background Little research has assessed the degree of severity and ordering of different types of sexual behaviors for HIV/STI infection in a measurement scale. The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex with men (MSM). Methods A cross-sectional study using respondent driven sampling was conducted among 351 MSM in Shenzhen, China. The Rasch model was used to examine the psychometric properties of an HIV/STI sexual risk scale including nine types of sexual behaviors. Results The Rasch analysis of the nine items met the unidimensionality and local independence assumption. Although the person reliability was low at 0.35, the item reliability was high at 0.99. The fit statistics provided acceptable infit and outfit values. Item difficulty invariance analysis showed that the item estimates of the risk behavior items were invariant (within error). Conclusions The findings suggest that the Rasch model can be utilized for measuring the level of sexual risk for HIV/STI infection as a single latent construct and for establishing the relative degree of severity of each type of sexual behavior in HIV/STI transmission and acquisition among MSM. The measurement scale provides a useful measurement tool to inform, design and evaluate behavioral interventions for HIV/STI infection among MSM. Sexual Behavior (dpeaa)DE-He213 Sexual Risk (dpeaa)DE-He213 Sexual Risk Behavior (dpeaa)DE-He213 Risky Sexual Behavior (dpeaa)DE-He213 Item Difficulty (dpeaa)DE-He213 Liu, Hongjie aut Liu, Hui aut Feng, Tiejian aut Cai, Yumao aut Enthalten in BMC public health London : BioMed Central, 2001 11(2011), 1 vom: 05. Okt. (DE-627)326643583 (DE-600)2041338-5 1471-2458 nnns volume:11 year:2011 number:1 day:05 month:10 https://dx.doi.org/10.1186/1471-2458-11-763 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA 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_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 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 11 2011 1 05 10
spelling	10.1186/1471-2458-11-763 doi (DE-627)SPR027860973 (SPR)1471-2458-11-763-e DE-627 ger DE-627 rakwb eng Li, Jian verfasserin aut Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Li et al; licensee BioMed Central Ltd. 2011 Background Little research has assessed the degree of severity and ordering of different types of sexual behaviors for HIV/STI infection in a measurement scale. The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex with men (MSM). Methods A cross-sectional study using respondent driven sampling was conducted among 351 MSM in Shenzhen, China. The Rasch model was used to examine the psychometric properties of an HIV/STI sexual risk scale including nine types of sexual behaviors. Results The Rasch analysis of the nine items met the unidimensionality and local independence assumption. Although the person reliability was low at 0.35, the item reliability was high at 0.99. The fit statistics provided acceptable infit and outfit values. Item difficulty invariance analysis showed that the item estimates of the risk behavior items were invariant (within error). Conclusions The findings suggest that the Rasch model can be utilized for measuring the level of sexual risk for HIV/STI infection as a single latent construct and for establishing the relative degree of severity of each type of sexual behavior in HIV/STI transmission and acquisition among MSM. The measurement scale provides a useful measurement tool to inform, design and evaluate behavioral interventions for HIV/STI infection among MSM. Sexual Behavior (dpeaa)DE-He213 Sexual Risk (dpeaa)DE-He213 Sexual Risk Behavior (dpeaa)DE-He213 Risky Sexual Behavior (dpeaa)DE-He213 Item Difficulty (dpeaa)DE-He213 Liu, Hongjie aut Liu, Hui aut Feng, Tiejian aut Cai, Yumao aut Enthalten in BMC public health London : BioMed Central, 2001 11(2011), 1 vom: 05. Okt. (DE-627)326643583 (DE-600)2041338-5 1471-2458 nnns volume:11 year:2011 number:1 day:05 month:10 https://dx.doi.org/10.1186/1471-2458-11-763 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA 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_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 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 11 2011 1 05 10
allfields_unstemmed	10.1186/1471-2458-11-763 doi (DE-627)SPR027860973 (SPR)1471-2458-11-763-e DE-627 ger DE-627 rakwb eng Li, Jian verfasserin aut Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Li et al; licensee BioMed Central Ltd. 2011 Background Little research has assessed the degree of severity and ordering of different types of sexual behaviors for HIV/STI infection in a measurement scale. The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex with men (MSM). Methods A cross-sectional study using respondent driven sampling was conducted among 351 MSM in Shenzhen, China. The Rasch model was used to examine the psychometric properties of an HIV/STI sexual risk scale including nine types of sexual behaviors. Results The Rasch analysis of the nine items met the unidimensionality and local independence assumption. Although the person reliability was low at 0.35, the item reliability was high at 0.99. The fit statistics provided acceptable infit and outfit values. Item difficulty invariance analysis showed that the item estimates of the risk behavior items were invariant (within error). Conclusions The findings suggest that the Rasch model can be utilized for measuring the level of sexual risk for HIV/STI infection as a single latent construct and for establishing the relative degree of severity of each type of sexual behavior in HIV/STI transmission and acquisition among MSM. The measurement scale provides a useful measurement tool to inform, design and evaluate behavioral interventions for HIV/STI infection among MSM. Sexual Behavior (dpeaa)DE-He213 Sexual Risk (dpeaa)DE-He213 Sexual Risk Behavior (dpeaa)DE-He213 Risky Sexual Behavior (dpeaa)DE-He213 Item Difficulty (dpeaa)DE-He213 Liu, Hongjie aut Liu, Hui aut Feng, Tiejian aut Cai, Yumao aut Enthalten in BMC public health London : BioMed Central, 2001 11(2011), 1 vom: 05. Okt. (DE-627)326643583 (DE-600)2041338-5 1471-2458 nnns volume:11 year:2011 number:1 day:05 month:10 https://dx.doi.org/10.1186/1471-2458-11-763 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA 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_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 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 11 2011 1 05 10
allfieldsGer	10.1186/1471-2458-11-763 doi (DE-627)SPR027860973 (SPR)1471-2458-11-763-e DE-627 ger DE-627 rakwb eng Li, Jian verfasserin aut Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Li et al; licensee BioMed Central Ltd. 2011 Background Little research has assessed the degree of severity and ordering of different types of sexual behaviors for HIV/STI infection in a measurement scale. The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex with men (MSM). Methods A cross-sectional study using respondent driven sampling was conducted among 351 MSM in Shenzhen, China. The Rasch model was used to examine the psychometric properties of an HIV/STI sexual risk scale including nine types of sexual behaviors. Results The Rasch analysis of the nine items met the unidimensionality and local independence assumption. Although the person reliability was low at 0.35, the item reliability was high at 0.99. The fit statistics provided acceptable infit and outfit values. Item difficulty invariance analysis showed that the item estimates of the risk behavior items were invariant (within error). Conclusions The findings suggest that the Rasch model can be utilized for measuring the level of sexual risk for HIV/STI infection as a single latent construct and for establishing the relative degree of severity of each type of sexual behavior in HIV/STI transmission and acquisition among MSM. The measurement scale provides a useful measurement tool to inform, design and evaluate behavioral interventions for HIV/STI infection among MSM. Sexual Behavior (dpeaa)DE-He213 Sexual Risk (dpeaa)DE-He213 Sexual Risk Behavior (dpeaa)DE-He213 Risky Sexual Behavior (dpeaa)DE-He213 Item Difficulty (dpeaa)DE-He213 Liu, Hongjie aut Liu, Hui aut Feng, Tiejian aut Cai, Yumao aut Enthalten in BMC public health London : BioMed Central, 2001 11(2011), 1 vom: 05. Okt. (DE-627)326643583 (DE-600)2041338-5 1471-2458 nnns volume:11 year:2011 number:1 day:05 month:10 https://dx.doi.org/10.1186/1471-2458-11-763 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA 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_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 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 11 2011 1 05 10
allfieldsSound	10.1186/1471-2458-11-763 doi (DE-627)SPR027860973 (SPR)1471-2458-11-763-e DE-627 ger DE-627 rakwb eng Li, Jian verfasserin aut Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach 2011 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Li et al; licensee BioMed Central Ltd. 2011 Background Little research has assessed the degree of severity and ordering of different types of sexual behaviors for HIV/STI infection in a measurement scale. The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex with men (MSM). Methods A cross-sectional study using respondent driven sampling was conducted among 351 MSM in Shenzhen, China. The Rasch model was used to examine the psychometric properties of an HIV/STI sexual risk scale including nine types of sexual behaviors. Results The Rasch analysis of the nine items met the unidimensionality and local independence assumption. Although the person reliability was low at 0.35, the item reliability was high at 0.99. The fit statistics provided acceptable infit and outfit values. Item difficulty invariance analysis showed that the item estimates of the risk behavior items were invariant (within error). Conclusions The findings suggest that the Rasch model can be utilized for measuring the level of sexual risk for HIV/STI infection as a single latent construct and for establishing the relative degree of severity of each type of sexual behavior in HIV/STI transmission and acquisition among MSM. The measurement scale provides a useful measurement tool to inform, design and evaluate behavioral interventions for HIV/STI infection among MSM. Sexual Behavior (dpeaa)DE-He213 Sexual Risk (dpeaa)DE-He213 Sexual Risk Behavior (dpeaa)DE-He213 Risky Sexual Behavior (dpeaa)DE-He213 Item Difficulty (dpeaa)DE-He213 Liu, Hongjie aut Liu, Hui aut Feng, Tiejian aut Cai, Yumao aut Enthalten in BMC public health London : BioMed Central, 2001 11(2011), 1 vom: 05. Okt. (DE-627)326643583 (DE-600)2041338-5 1471-2458 nnns volume:11 year:2011 number:1 day:05 month:10 https://dx.doi.org/10.1186/1471-2458-11-763 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA 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_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 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 11 2011 1 05 10
language	English
source	Enthalten in BMC public health 11(2011), 1 vom: 05. Okt. volume:11 year:2011 number:1 day:05 month:10
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author	Li, Jian
spellingShingle	Li, Jian misc Sexual Behavior misc Sexual Risk misc Sexual Risk Behavior misc Risky Sexual Behavior misc Item Difficulty Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach
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topic_title	Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach Sexual Behavior (dpeaa)DE-He213 Sexual Risk (dpeaa)DE-He213 Sexual Risk Behavior (dpeaa)DE-He213 Risky Sexual Behavior (dpeaa)DE-He213 Item Difficulty (dpeaa)DE-He213
topic	misc Sexual Behavior misc Sexual Risk misc Sexual Risk Behavior misc Risky Sexual Behavior misc Item Difficulty
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title	Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach
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title_sort	psychometric assessment of hiv/sti sexual risk scale among msm: a rasch model approach
title_auth	Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach
abstract	Background Little research has assessed the degree of severity and ordering of different types of sexual behaviors for HIV/STI infection in a measurement scale. The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex with men (MSM). Methods A cross-sectional study using respondent driven sampling was conducted among 351 MSM in Shenzhen, China. The Rasch model was used to examine the psychometric properties of an HIV/STI sexual risk scale including nine types of sexual behaviors. Results The Rasch analysis of the nine items met the unidimensionality and local independence assumption. Although the person reliability was low at 0.35, the item reliability was high at 0.99. The fit statistics provided acceptable infit and outfit values. Item difficulty invariance analysis showed that the item estimates of the risk behavior items were invariant (within error). Conclusions The findings suggest that the Rasch model can be utilized for measuring the level of sexual risk for HIV/STI infection as a single latent construct and for establishing the relative degree of severity of each type of sexual behavior in HIV/STI transmission and acquisition among MSM. The measurement scale provides a useful measurement tool to inform, design and evaluate behavioral interventions for HIV/STI infection among MSM. © Li et al; licensee BioMed Central Ltd. 2011
abstractGer	Background Little research has assessed the degree of severity and ordering of different types of sexual behaviors for HIV/STI infection in a measurement scale. The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex with men (MSM). Methods A cross-sectional study using respondent driven sampling was conducted among 351 MSM in Shenzhen, China. The Rasch model was used to examine the psychometric properties of an HIV/STI sexual risk scale including nine types of sexual behaviors. Results The Rasch analysis of the nine items met the unidimensionality and local independence assumption. Although the person reliability was low at 0.35, the item reliability was high at 0.99. The fit statistics provided acceptable infit and outfit values. Item difficulty invariance analysis showed that the item estimates of the risk behavior items were invariant (within error). Conclusions The findings suggest that the Rasch model can be utilized for measuring the level of sexual risk for HIV/STI infection as a single latent construct and for establishing the relative degree of severity of each type of sexual behavior in HIV/STI transmission and acquisition among MSM. The measurement scale provides a useful measurement tool to inform, design and evaluate behavioral interventions for HIV/STI infection among MSM. © Li et al; licensee BioMed Central Ltd. 2011
abstract_unstemmed	Background Little research has assessed the degree of severity and ordering of different types of sexual behaviors for HIV/STI infection in a measurement scale. The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex with men (MSM). Methods A cross-sectional study using respondent driven sampling was conducted among 351 MSM in Shenzhen, China. The Rasch model was used to examine the psychometric properties of an HIV/STI sexual risk scale including nine types of sexual behaviors. Results The Rasch analysis of the nine items met the unidimensionality and local independence assumption. Although the person reliability was low at 0.35, the item reliability was high at 0.99. The fit statistics provided acceptable infit and outfit values. Item difficulty invariance analysis showed that the item estimates of the risk behavior items were invariant (within error). Conclusions The findings suggest that the Rasch model can be utilized for measuring the level of sexual risk for HIV/STI infection as a single latent construct and for establishing the relative degree of severity of each type of sexual behavior in HIV/STI transmission and acquisition among MSM. The measurement scale provides a useful measurement tool to inform, design and evaluate behavioral interventions for HIV/STI infection among MSM. © Li et al; licensee BioMed Central Ltd. 2011
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title_short	Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach
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The purpose of this study was to apply the Rasch model on psychometric assessment of an HIV/STI sexual risk scale among men who have sex with men (MSM). Methods A cross-sectional study using respondent driven sampling was conducted among 351 MSM in Shenzhen, China. The Rasch model was used to examine the psychometric properties of an HIV/STI sexual risk scale including nine types of sexual behaviors. Results The Rasch analysis of the nine items met the unidimensionality and local independence assumption. Although the person reliability was low at 0.35, the item reliability was high at 0.99. The fit statistics provided acceptable infit and outfit values. Item difficulty invariance analysis showed that the item estimates of the risk behavior items were invariant (within error). Conclusions The findings suggest that the Rasch model can be utilized for measuring the level of sexual risk for HIV/STI infection as a single latent construct and for establishing the relative degree of severity of each type of sexual behavior in HIV/STI transmission and acquisition among MSM. 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Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach

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