Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level
Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. The measurements were part of an epidemiological study on the relationship between magnetic fields and childhood leukemia. We performed a fixed-location meas...
Ausführliche Beschreibung
Autor*in: |
Schüz, Joachim [verfasserIn] |
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Format: |
Artikel |
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Sprache: |
Englisch |
Erschienen: |
2000 |
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Schlagwörter: |
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Anmerkung: |
© Springer-Verlag Berlin Heidelberg 2000 |
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Übergeordnetes Werk: |
Enthalten in: Radiation and environmental biophysics - Springer-Verlag, 1974, 39(2000), 4 vom: Dez., Seite 233-240 |
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Übergeordnetes Werk: |
volume:39 ; year:2000 ; number:4 ; month:12 ; pages:233-240 |
Links: |
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DOI / URN: |
10.1007/s004110000068 |
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Katalog-ID: |
OLC2075414297 |
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245 | 1 | 0 | |a Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level |
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520 | |a Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. The measurements were part of an epidemiological study on the relationship between magnetic fields and childhood leukemia. We performed a fixed-location measurement of the magnetic field at 50 Hz and 16 2/3 Hz (frequency of the German railway system) over 24 h in the child’s bedroom in the residence of each study participant. In addition, we conducted a second 24 h-measurement in the living room at 50 Hz, and spot measurements while walking through all rooms of the respective dwelling. Median 50 Hz magnetic fields above 0.2 µT were found to be infrequent in Germany (only 1.4% of all residences). Fields produced by high-voltage power lines (123–420 kV) were lower than expected: the median magnetic field was above 0.2 µT in only 8 (32.0%) of 25 residences located 50 m or closer to a high-voltage power line indicating that power lines in Germany are usually run well below the maximum power load. We found that magnetic fields were correlated with the type of residence and higher magnetic fields were measured in apartment buildings. There was also some evidence for a positive correlation between magnetic fields and traffic density and an inverse association between magnetic fields and family net income. The 24 h-magnetic field measurements correlated well with the spot measurements (r>0.7). However, when dichotomized with a cut-off point of 0.2 µT, there was only a poor agreement between the two measurement methods. A loss of the strength of the association after categorization was also observed when comparing the arithmetic mean and median of the same 24 h-measurement. In summary, these analyses give a valuable overview of magnetic field distributions in German residences. | ||
650 | 4 | |a Magnetic Field | |
650 | 4 | |a High Magnetic Field | |
650 | 4 | |a Traffic Density | |
650 | 4 | |a Childhood Leukemia | |
650 | 4 | |a Power Load | |
700 | 1 | |a Grigat, Jan-Peter |4 aut | |
700 | 1 | |a Störmer, Bernd |4 aut | |
700 | 1 | |a Rippin, Gerd |4 aut | |
700 | 1 | |a Brinkmann, Karl |4 aut | |
700 | 1 | |a Michaelis, Jörg |4 aut | |
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10.1007/s004110000068 doi (DE-627)OLC2075414297 (DE-He213)s004110000068-p DE-627 ger DE-627 rakwb eng 570 530 VZ 12 ssgn BIODIV DE-30 fid Schüz, Joachim verfasserin aut Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2000 Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. The measurements were part of an epidemiological study on the relationship between magnetic fields and childhood leukemia. We performed a fixed-location measurement of the magnetic field at 50 Hz and 16 2/3 Hz (frequency of the German railway system) over 24 h in the child’s bedroom in the residence of each study participant. In addition, we conducted a second 24 h-measurement in the living room at 50 Hz, and spot measurements while walking through all rooms of the respective dwelling. Median 50 Hz magnetic fields above 0.2 µT were found to be infrequent in Germany (only 1.4% of all residences). Fields produced by high-voltage power lines (123–420 kV) were lower than expected: the median magnetic field was above 0.2 µT in only 8 (32.0%) of 25 residences located 50 m or closer to a high-voltage power line indicating that power lines in Germany are usually run well below the maximum power load. We found that magnetic fields were correlated with the type of residence and higher magnetic fields were measured in apartment buildings. There was also some evidence for a positive correlation between magnetic fields and traffic density and an inverse association between magnetic fields and family net income. The 24 h-magnetic field measurements correlated well with the spot measurements (r>0.7). However, when dichotomized with a cut-off point of 0.2 µT, there was only a poor agreement between the two measurement methods. A loss of the strength of the association after categorization was also observed when comparing the arithmetic mean and median of the same 24 h-measurement. In summary, these analyses give a valuable overview of magnetic field distributions in German residences. Magnetic Field High Magnetic Field Traffic Density Childhood Leukemia Power Load Grigat, Jan-Peter aut Störmer, Bernd aut Rippin, Gerd aut Brinkmann, Karl aut Michaelis, Jörg aut Enthalten in Radiation and environmental biophysics Springer-Verlag, 1974 39(2000), 4 vom: Dez., Seite 233-240 (DE-627)129308528 (DE-600)124987-3 (DE-576)014507870 0301-634X nnns volume:39 year:2000 number:4 month:12 pages:233-240 https://doi.org/10.1007/s004110000068 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-PHY SSG-OPC-GGO GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_101 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4082 GBV_ILN_4219 GBV_ILN_4277 AR 39 2000 4 12 233-240 |
spelling |
10.1007/s004110000068 doi (DE-627)OLC2075414297 (DE-He213)s004110000068-p DE-627 ger DE-627 rakwb eng 570 530 VZ 12 ssgn BIODIV DE-30 fid Schüz, Joachim verfasserin aut Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2000 Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. The measurements were part of an epidemiological study on the relationship between magnetic fields and childhood leukemia. We performed a fixed-location measurement of the magnetic field at 50 Hz and 16 2/3 Hz (frequency of the German railway system) over 24 h in the child’s bedroom in the residence of each study participant. In addition, we conducted a second 24 h-measurement in the living room at 50 Hz, and spot measurements while walking through all rooms of the respective dwelling. Median 50 Hz magnetic fields above 0.2 µT were found to be infrequent in Germany (only 1.4% of all residences). Fields produced by high-voltage power lines (123–420 kV) were lower than expected: the median magnetic field was above 0.2 µT in only 8 (32.0%) of 25 residences located 50 m or closer to a high-voltage power line indicating that power lines in Germany are usually run well below the maximum power load. We found that magnetic fields were correlated with the type of residence and higher magnetic fields were measured in apartment buildings. There was also some evidence for a positive correlation between magnetic fields and traffic density and an inverse association between magnetic fields and family net income. The 24 h-magnetic field measurements correlated well with the spot measurements (r>0.7). However, when dichotomized with a cut-off point of 0.2 µT, there was only a poor agreement between the two measurement methods. A loss of the strength of the association after categorization was also observed when comparing the arithmetic mean and median of the same 24 h-measurement. In summary, these analyses give a valuable overview of magnetic field distributions in German residences. Magnetic Field High Magnetic Field Traffic Density Childhood Leukemia Power Load Grigat, Jan-Peter aut Störmer, Bernd aut Rippin, Gerd aut Brinkmann, Karl aut Michaelis, Jörg aut Enthalten in Radiation and environmental biophysics Springer-Verlag, 1974 39(2000), 4 vom: Dez., Seite 233-240 (DE-627)129308528 (DE-600)124987-3 (DE-576)014507870 0301-634X nnns volume:39 year:2000 number:4 month:12 pages:233-240 https://doi.org/10.1007/s004110000068 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-PHY SSG-OPC-GGO GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_101 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4082 GBV_ILN_4219 GBV_ILN_4277 AR 39 2000 4 12 233-240 |
allfields_unstemmed |
10.1007/s004110000068 doi (DE-627)OLC2075414297 (DE-He213)s004110000068-p DE-627 ger DE-627 rakwb eng 570 530 VZ 12 ssgn BIODIV DE-30 fid Schüz, Joachim verfasserin aut Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2000 Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. The measurements were part of an epidemiological study on the relationship between magnetic fields and childhood leukemia. We performed a fixed-location measurement of the magnetic field at 50 Hz and 16 2/3 Hz (frequency of the German railway system) over 24 h in the child’s bedroom in the residence of each study participant. In addition, we conducted a second 24 h-measurement in the living room at 50 Hz, and spot measurements while walking through all rooms of the respective dwelling. Median 50 Hz magnetic fields above 0.2 µT were found to be infrequent in Germany (only 1.4% of all residences). Fields produced by high-voltage power lines (123–420 kV) were lower than expected: the median magnetic field was above 0.2 µT in only 8 (32.0%) of 25 residences located 50 m or closer to a high-voltage power line indicating that power lines in Germany are usually run well below the maximum power load. We found that magnetic fields were correlated with the type of residence and higher magnetic fields were measured in apartment buildings. There was also some evidence for a positive correlation between magnetic fields and traffic density and an inverse association between magnetic fields and family net income. The 24 h-magnetic field measurements correlated well with the spot measurements (r>0.7). However, when dichotomized with a cut-off point of 0.2 µT, there was only a poor agreement between the two measurement methods. A loss of the strength of the association after categorization was also observed when comparing the arithmetic mean and median of the same 24 h-measurement. In summary, these analyses give a valuable overview of magnetic field distributions in German residences. Magnetic Field High Magnetic Field Traffic Density Childhood Leukemia Power Load Grigat, Jan-Peter aut Störmer, Bernd aut Rippin, Gerd aut Brinkmann, Karl aut Michaelis, Jörg aut Enthalten in Radiation and environmental biophysics Springer-Verlag, 1974 39(2000), 4 vom: Dez., Seite 233-240 (DE-627)129308528 (DE-600)124987-3 (DE-576)014507870 0301-634X nnns volume:39 year:2000 number:4 month:12 pages:233-240 https://doi.org/10.1007/s004110000068 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-PHY SSG-OPC-GGO GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_101 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4082 GBV_ILN_4219 GBV_ILN_4277 AR 39 2000 4 12 233-240 |
allfieldsGer |
10.1007/s004110000068 doi (DE-627)OLC2075414297 (DE-He213)s004110000068-p DE-627 ger DE-627 rakwb eng 570 530 VZ 12 ssgn BIODIV DE-30 fid Schüz, Joachim verfasserin aut Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2000 Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. The measurements were part of an epidemiological study on the relationship between magnetic fields and childhood leukemia. We performed a fixed-location measurement of the magnetic field at 50 Hz and 16 2/3 Hz (frequency of the German railway system) over 24 h in the child’s bedroom in the residence of each study participant. In addition, we conducted a second 24 h-measurement in the living room at 50 Hz, and spot measurements while walking through all rooms of the respective dwelling. Median 50 Hz magnetic fields above 0.2 µT were found to be infrequent in Germany (only 1.4% of all residences). Fields produced by high-voltage power lines (123–420 kV) were lower than expected: the median magnetic field was above 0.2 µT in only 8 (32.0%) of 25 residences located 50 m or closer to a high-voltage power line indicating that power lines in Germany are usually run well below the maximum power load. We found that magnetic fields were correlated with the type of residence and higher magnetic fields were measured in apartment buildings. There was also some evidence for a positive correlation between magnetic fields and traffic density and an inverse association between magnetic fields and family net income. The 24 h-magnetic field measurements correlated well with the spot measurements (r>0.7). However, when dichotomized with a cut-off point of 0.2 µT, there was only a poor agreement between the two measurement methods. A loss of the strength of the association after categorization was also observed when comparing the arithmetic mean and median of the same 24 h-measurement. In summary, these analyses give a valuable overview of magnetic field distributions in German residences. Magnetic Field High Magnetic Field Traffic Density Childhood Leukemia Power Load Grigat, Jan-Peter aut Störmer, Bernd aut Rippin, Gerd aut Brinkmann, Karl aut Michaelis, Jörg aut Enthalten in Radiation and environmental biophysics Springer-Verlag, 1974 39(2000), 4 vom: Dez., Seite 233-240 (DE-627)129308528 (DE-600)124987-3 (DE-576)014507870 0301-634X nnns volume:39 year:2000 number:4 month:12 pages:233-240 https://doi.org/10.1007/s004110000068 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-PHY SSG-OPC-GGO GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_101 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4082 GBV_ILN_4219 GBV_ILN_4277 AR 39 2000 4 12 233-240 |
allfieldsSound |
10.1007/s004110000068 doi (DE-627)OLC2075414297 (DE-He213)s004110000068-p DE-627 ger DE-627 rakwb eng 570 530 VZ 12 ssgn BIODIV DE-30 fid Schüz, Joachim verfasserin aut Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2000 Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. The measurements were part of an epidemiological study on the relationship between magnetic fields and childhood leukemia. We performed a fixed-location measurement of the magnetic field at 50 Hz and 16 2/3 Hz (frequency of the German railway system) over 24 h in the child’s bedroom in the residence of each study participant. In addition, we conducted a second 24 h-measurement in the living room at 50 Hz, and spot measurements while walking through all rooms of the respective dwelling. Median 50 Hz magnetic fields above 0.2 µT were found to be infrequent in Germany (only 1.4% of all residences). Fields produced by high-voltage power lines (123–420 kV) were lower than expected: the median magnetic field was above 0.2 µT in only 8 (32.0%) of 25 residences located 50 m or closer to a high-voltage power line indicating that power lines in Germany are usually run well below the maximum power load. We found that magnetic fields were correlated with the type of residence and higher magnetic fields were measured in apartment buildings. There was also some evidence for a positive correlation between magnetic fields and traffic density and an inverse association between magnetic fields and family net income. The 24 h-magnetic field measurements correlated well with the spot measurements (r>0.7). However, when dichotomized with a cut-off point of 0.2 µT, there was only a poor agreement between the two measurement methods. A loss of the strength of the association after categorization was also observed when comparing the arithmetic mean and median of the same 24 h-measurement. In summary, these analyses give a valuable overview of magnetic field distributions in German residences. Magnetic Field High Magnetic Field Traffic Density Childhood Leukemia Power Load Grigat, Jan-Peter aut Störmer, Bernd aut Rippin, Gerd aut Brinkmann, Karl aut Michaelis, Jörg aut Enthalten in Radiation and environmental biophysics Springer-Verlag, 1974 39(2000), 4 vom: Dez., Seite 233-240 (DE-627)129308528 (DE-600)124987-3 (DE-576)014507870 0301-634X nnns volume:39 year:2000 number:4 month:12 pages:233-240 https://doi.org/10.1007/s004110000068 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-PHY SSG-OPC-GGO GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_40 GBV_ILN_65 GBV_ILN_70 GBV_ILN_101 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4082 GBV_ILN_4219 GBV_ILN_4277 AR 39 2000 4 12 233-240 |
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Enthalten in Radiation and environmental biophysics 39(2000), 4 vom: Dez., Seite 233-240 volume:39 year:2000 number:4 month:12 pages:233-240 |
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Enthalten in Radiation and environmental biophysics 39(2000), 4 vom: Dez., Seite 233-240 volume:39 year:2000 number:4 month:12 pages:233-240 |
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Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2000</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">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© Springer-Verlag Berlin Heidelberg 2000</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. 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Schüz, Joachim |
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Schüz, Joachim ddc 570 ssgn 12 fid BIODIV misc Magnetic Field misc High Magnetic Field misc Traffic Density misc Childhood Leukemia misc Power Load Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level |
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570 530 VZ 12 ssgn BIODIV DE-30 fid Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level Magnetic Field High Magnetic Field Traffic Density Childhood Leukemia Power Load |
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Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level |
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extremely low frequency magnetic fields in residences in germany. distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level |
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Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level |
abstract |
Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. The measurements were part of an epidemiological study on the relationship between magnetic fields and childhood leukemia. We performed a fixed-location measurement of the magnetic field at 50 Hz and 16 2/3 Hz (frequency of the German railway system) over 24 h in the child’s bedroom in the residence of each study participant. In addition, we conducted a second 24 h-measurement in the living room at 50 Hz, and spot measurements while walking through all rooms of the respective dwelling. Median 50 Hz magnetic fields above 0.2 µT were found to be infrequent in Germany (only 1.4% of all residences). Fields produced by high-voltage power lines (123–420 kV) were lower than expected: the median magnetic field was above 0.2 µT in only 8 (32.0%) of 25 residences located 50 m or closer to a high-voltage power line indicating that power lines in Germany are usually run well below the maximum power load. We found that magnetic fields were correlated with the type of residence and higher magnetic fields were measured in apartment buildings. There was also some evidence for a positive correlation between magnetic fields and traffic density and an inverse association between magnetic fields and family net income. The 24 h-magnetic field measurements correlated well with the spot measurements (r>0.7). However, when dichotomized with a cut-off point of 0.2 µT, there was only a poor agreement between the two measurement methods. A loss of the strength of the association after categorization was also observed when comparing the arithmetic mean and median of the same 24 h-measurement. In summary, these analyses give a valuable overview of magnetic field distributions in German residences. © Springer-Verlag Berlin Heidelberg 2000 |
abstractGer |
Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. The measurements were part of an epidemiological study on the relationship between magnetic fields and childhood leukemia. We performed a fixed-location measurement of the magnetic field at 50 Hz and 16 2/3 Hz (frequency of the German railway system) over 24 h in the child’s bedroom in the residence of each study participant. In addition, we conducted a second 24 h-measurement in the living room at 50 Hz, and spot measurements while walking through all rooms of the respective dwelling. Median 50 Hz magnetic fields above 0.2 µT were found to be infrequent in Germany (only 1.4% of all residences). Fields produced by high-voltage power lines (123–420 kV) were lower than expected: the median magnetic field was above 0.2 µT in only 8 (32.0%) of 25 residences located 50 m or closer to a high-voltage power line indicating that power lines in Germany are usually run well below the maximum power load. We found that magnetic fields were correlated with the type of residence and higher magnetic fields were measured in apartment buildings. There was also some evidence for a positive correlation between magnetic fields and traffic density and an inverse association between magnetic fields and family net income. The 24 h-magnetic field measurements correlated well with the spot measurements (r>0.7). However, when dichotomized with a cut-off point of 0.2 µT, there was only a poor agreement between the two measurement methods. A loss of the strength of the association after categorization was also observed when comparing the arithmetic mean and median of the same 24 h-measurement. In summary, these analyses give a valuable overview of magnetic field distributions in German residences. © Springer-Verlag Berlin Heidelberg 2000 |
abstract_unstemmed |
Abstract We examined the results of 1,835 magnetic field measurements in German residences conducted between November 1997 and September 1999. The measurements were part of an epidemiological study on the relationship between magnetic fields and childhood leukemia. We performed a fixed-location measurement of the magnetic field at 50 Hz and 16 2/3 Hz (frequency of the German railway system) over 24 h in the child’s bedroom in the residence of each study participant. In addition, we conducted a second 24 h-measurement in the living room at 50 Hz, and spot measurements while walking through all rooms of the respective dwelling. Median 50 Hz magnetic fields above 0.2 µT were found to be infrequent in Germany (only 1.4% of all residences). Fields produced by high-voltage power lines (123–420 kV) were lower than expected: the median magnetic field was above 0.2 µT in only 8 (32.0%) of 25 residences located 50 m or closer to a high-voltage power line indicating that power lines in Germany are usually run well below the maximum power load. We found that magnetic fields were correlated with the type of residence and higher magnetic fields were measured in apartment buildings. There was also some evidence for a positive correlation between magnetic fields and traffic density and an inverse association between magnetic fields and family net income. The 24 h-magnetic field measurements correlated well with the spot measurements (r>0.7). However, when dichotomized with a cut-off point of 0.2 µT, there was only a poor agreement between the two measurement methods. A loss of the strength of the association after categorization was also observed when comparing the arithmetic mean and median of the same 24 h-measurement. In summary, these analyses give a valuable overview of magnetic field distributions in German residences. © Springer-Verlag Berlin Heidelberg 2000 |
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title_short |
Extremely low frequency magnetic fields in residences in Germany. Distribution of measurements, comparison of two methods for assessing exposure, and predictors for the occurrence of magnetic fields above background level |
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