Trends in blood lead levels in UK workers, 1995–2007

ObjectivesThis study evaluated blood lead data (including zinc protoporphyrin (ZPP) and haemoglobin levels) collected at the UK's Health and Safety Laboratory (HSL) in order to determine temporal changes in occupational exposure to lead between 1995 and 2007.MethodsA total of 20 889 blood lead...

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Veröffentlicht in:Occupational and environmental medicine (London, England) England), 2010-09, Vol.67 (9), p.590-595
Hauptverfasser: Morton, Jackie, Cotton, Richard, Cocker, John, Warren, Nicholas D
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creator Morton, Jackie
Cotton, Richard
Cocker, John
Warren, Nicholas D
description ObjectivesThis study evaluated blood lead data (including zinc protoporphyrin (ZPP) and haemoglobin levels) collected at the UK's Health and Safety Laboratory (HSL) in order to determine temporal changes in occupational exposure to lead between 1995 and 2007.MethodsA total of 20 889 blood lead measurements and accompanying ZPP and haemoglobin results from 8810 workers at 972 companies from routine samples received by HSL over the period 1995–2007 were analysed. Time trends in blood lead levels for each industry sector were estimated using Bayesian mixed effects modelling.ResultsReductions in median blood levels over the period 1995–2007 were seen in every sector except for those samples forwarded by occupational health providers, and range from 1.6% per year for workers in the smelting industry to 12% per year for workers in pottery and glazing industries. An overall reduction of 3.1% per year across all industries was determined. The percentage of results above the current UK suspension limit of 60 μg/dl fell from 4.8% in 1995 to 0.6% in 2007. ZPP and blood lead exhibited a strong association, but no significant correlation was found between blood lead and haemoglobin.ConclusionsOccupational exposure to lead has fallen across UK industries in recent years, although it remains substantially above background levels. There is evidence that many workers are exposed to elevated lead levels over a long period of time and this deserves renewed consideration now that inorganic lead has been reclassified as a probable human carcinogen.
doi_str_mv 10.1136/oem.2009.047258
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Time trends in blood lead levels for each industry sector were estimated using Bayesian mixed effects modelling.ResultsReductions in median blood levels over the period 1995–2007 were seen in every sector except for those samples forwarded by occupational health providers, and range from 1.6% per year for workers in the smelting industry to 12% per year for workers in pottery and glazing industries. An overall reduction of 3.1% per year across all industries was determined. The percentage of results above the current UK suspension limit of 60 μg/dl fell from 4.8% in 1995 to 0.6% in 2007. ZPP and blood lead exhibited a strong association, but no significant correlation was found between blood lead and haemoglobin.ConclusionsOccupational exposure to lead has fallen across UK industries in recent years, although it remains substantially above background levels. There is evidence that many workers are exposed to elevated lead levels over a long period of time and this deserves renewed consideration now that inorganic lead has been reclassified as a probable human carcinogen.</description><identifier>ISSN: 1351-0711</identifier><identifier>EISSN: 1470-7926</identifier><identifier>DOI: 10.1136/oem.2009.047258</identifier><identifier>PMID: 20798026</identifier><language>eng</language><publisher>London: BMJ Publishing Group Ltd</publisher><subject>Adolescent ; Adult ; Aged ; Bayesian ; Biological and medical sciences ; biological monitoring ; biomonitoring ; Blood ; Blood lead ; Blood levels ; Chemical and industrial products toxicology. Toxic occupational diseases ; Claws ; Environmental Monitoring - methods ; Female ; Hemoglobins - metabolism ; Humans ; Industrial refining ; Industrial sectors ; Industry - statistics &amp; numerical data ; Industry - trends ; Laboratories ; Lead ; Lead - blood ; Lead acid batteries ; Lead alloys ; Lead content ; Lead industry ; Lead poisoning ; Male ; Medical sciences ; Metals and various inorganic compounds ; Middle Aged ; Occupational exposure ; Occupational Exposure - analysis ; Occupational Exposure - statistics &amp; numerical data ; Occupational health ; Occupational health and safety ; occupational health practice ; Protoporphyrins - blood ; Smelting ; statistics ; time trends ; Toxicology ; Trends ; United Kingdom ; Workplace ; Young Adult</subject><ispartof>Occupational and environmental medicine (London, England), 2010-09, Vol.67 (9), p.590-595</ispartof><rights>2010, Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.</rights><rights>Copyright © 2010 BMJ Publishing Group</rights><rights>2015 INIST-CNRS</rights><rights>Copyright: 2010 (c) 2010, Published by the BMJ Publishing Group Limited. 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Time trends in blood lead levels for each industry sector were estimated using Bayesian mixed effects modelling.ResultsReductions in median blood levels over the period 1995–2007 were seen in every sector except for those samples forwarded by occupational health providers, and range from 1.6% per year for workers in the smelting industry to 12% per year for workers in pottery and glazing industries. An overall reduction of 3.1% per year across all industries was determined. The percentage of results above the current UK suspension limit of 60 μg/dl fell from 4.8% in 1995 to 0.6% in 2007. ZPP and blood lead exhibited a strong association, but no significant correlation was found between blood lead and haemoglobin.ConclusionsOccupational exposure to lead has fallen across UK industries in recent years, although it remains substantially above background levels. There is evidence that many workers are exposed to elevated lead levels over a long period of time and this deserves renewed consideration now that inorganic lead has been reclassified as a probable human carcinogen.</description><subject>Adolescent</subject><subject>Adult</subject><subject>Aged</subject><subject>Bayesian</subject><subject>Biological and medical sciences</subject><subject>biological monitoring</subject><subject>biomonitoring</subject><subject>Blood</subject><subject>Blood lead</subject><subject>Blood levels</subject><subject>Chemical and industrial products toxicology. 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Time trends in blood lead levels for each industry sector were estimated using Bayesian mixed effects modelling.ResultsReductions in median blood levels over the period 1995–2007 were seen in every sector except for those samples forwarded by occupational health providers, and range from 1.6% per year for workers in the smelting industry to 12% per year for workers in pottery and glazing industries. An overall reduction of 3.1% per year across all industries was determined. The percentage of results above the current UK suspension limit of 60 μg/dl fell from 4.8% in 1995 to 0.6% in 2007. ZPP and blood lead exhibited a strong association, but no significant correlation was found between blood lead and haemoglobin.ConclusionsOccupational exposure to lead has fallen across UK industries in recent years, although it remains substantially above background levels. There is evidence that many workers are exposed to elevated lead levels over a long period of time and this deserves renewed consideration now that inorganic lead has been reclassified as a probable human carcinogen.</abstract><cop>London</cop><pub>BMJ Publishing Group Ltd</pub><pmid>20798026</pmid><doi>10.1136/oem.2009.047258</doi><tpages>6</tpages></addata></record>
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subjects Adolescent
Adult
Aged
Bayesian
Biological and medical sciences
biological monitoring
biomonitoring
Blood
Blood lead
Blood levels
Chemical and industrial products toxicology. Toxic occupational diseases
Claws
Environmental Monitoring - methods
Female
Hemoglobins - metabolism
Humans
Industrial refining
Industrial sectors
Industry - statistics & numerical data
Industry - trends
Laboratories
Lead
Lead - blood
Lead acid batteries
Lead alloys
Lead content
Lead industry
Lead poisoning
Male
Medical sciences
Metals and various inorganic compounds
Middle Aged
Occupational exposure
Occupational Exposure - analysis
Occupational Exposure - statistics & numerical data
Occupational health
Occupational health and safety
occupational health practice
Protoporphyrins - blood
Smelting
statistics
time trends
Toxicology
Trends
United Kingdom
Workplace
Young Adult
title Trends in blood lead levels in UK workers, 1995–2007
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