Longitudinal relationship between personal CO and personal PM2.5 among women cooking with woodfired cookstoves in Guatemala
Household air pollution (HAP) due to solid fuel use is a major public health threat in low-income countries. Most health effects are thought to be related to exposure to the fine particulate matter (PM) component of HAP, but it is currently impractical to measure personal exposure to PM in large stu...
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| description | Household air pollution (HAP) due to solid fuel use is a major public health threat in low-income countries. Most health effects are thought to be related to exposure to the fine particulate matter (PM) component of HAP, but it is currently impractical to measure personal exposure to PM in large studies. Carbon monoxide (CO) has been shown in cross-sectional analyses to be a reliable surrogate for particles |
| doi_str_mv | 10.1371/journal.pone.0055670 |
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Most health effects are thought to be related to exposure to the fine particulate matter (PM) component of HAP, but it is currently impractical to measure personal exposure to PM in large studies. Carbon monoxide (CO) has been shown in cross-sectional analyses to be a reliable surrogate for particles<2.5 µm in diameter (PM2.5) in kitchens where wood-burning cookfires are a dominant source, but it is unknown whether a similar PM2.5-CO relationship exists for personal exposures longitudinally. We repeatedly measured (216 measures, 116 women) 24-hour personal PM2.5 (median [IQR] = 0.11 [0.05, 0.21] mg/m(3)) and CO (median [IQR] = 1.18 [0.50, 2.37] mg/m(3)) among women cooking over open woodfires or chimney woodstoves in Guatemala. Pollution measures were natural-log transformed for analyses. In linear mixed effects models with random subject intercepts, we found that personal CO explained 78% of between-subject variance in personal PM2.5. We did not see a difference in slope by stove type. This work provides evidence that in settings where there is a dominant source of biomass combustion, repeated measures of personal CO can be used as a reliable surrogate for an individual's PM2.5 exposure. This finding has important implications for the feasibility of reliably estimating long-term (months to years) PM2.5 exposure in large-scale epidemiological and intervention studies of HAP.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0055670</identifier><identifier>PMID: 23468847</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Adult ; Air pollution ; Air pollution measurements ; Air Pollution, Indoor ; Biology ; Biomass burning ; Burning ; Carbon monoxide ; Carbon Monoxide - analysis ; Chemistry ; Combustion ; Cooking ; Earth Sciences ; Engineering ; Epidemiology ; Exposure ; Feasibility studies ; Female ; Guatemala ; Health risks ; Households ; Humans ; Kitchens ; Longitudinal Studies ; Medicine ; Molecular Weight ; Outdoor air quality ; Particle Size ; Particulate emissions ; Particulate matter ; Particulate Matter - analysis ; Pollution ; Pollution effects ; Public health ; Public Health Surveillance ; Solid fuels ; Studies ; Wood</subject><ispartof>PloS one, 2013-02, Vol.8 (2), p.e55670</ispartof><rights>2013 McCracken et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License: https://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 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Most health effects are thought to be related to exposure to the fine particulate matter (PM) component of HAP, but it is currently impractical to measure personal exposure to PM in large studies. Carbon monoxide (CO) has been shown in cross-sectional analyses to be a reliable surrogate for particles<2.5 µm in diameter (PM2.5) in kitchens where wood-burning cookfires are a dominant source, but it is unknown whether a similar PM2.5-CO relationship exists for personal exposures longitudinally. We repeatedly measured (216 measures, 116 women) 24-hour personal PM2.5 (median [IQR] = 0.11 [0.05, 0.21] mg/m(3)) and CO (median [IQR] = 1.18 [0.50, 2.37] mg/m(3)) among women cooking over open woodfires or chimney woodstoves in Guatemala. Pollution measures were natural-log transformed for analyses. In linear mixed effects models with random subject intercepts, we found that personal CO explained 78% of between-subject variance in personal PM2.5. We did not see a difference in slope by stove type. This work provides evidence that in settings where there is a dominant source of biomass combustion, repeated measures of personal CO can be used as a reliable surrogate for an individual's PM2.5 exposure. 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Most health effects are thought to be related to exposure to the fine particulate matter (PM) component of HAP, but it is currently impractical to measure personal exposure to PM in large studies. Carbon monoxide (CO) has been shown in cross-sectional analyses to be a reliable surrogate for particles<2.5 µm in diameter (PM2.5) in kitchens where wood-burning cookfires are a dominant source, but it is unknown whether a similar PM2.5-CO relationship exists for personal exposures longitudinally. We repeatedly measured (216 measures, 116 women) 24-hour personal PM2.5 (median [IQR] = 0.11 [0.05, 0.21] mg/m(3)) and CO (median [IQR] = 1.18 [0.50, 2.37] mg/m(3)) among women cooking over open woodfires or chimney woodstoves in Guatemala. Pollution measures were natural-log transformed for analyses. In linear mixed effects models with random subject intercepts, we found that personal CO explained 78% of between-subject variance in personal PM2.5. We did not see a difference in slope by stove type. This work provides evidence that in settings where there is a dominant source of biomass combustion, repeated measures of personal CO can be used as a reliable surrogate for an individual's PM2.5 exposure. This finding has important implications for the feasibility of reliably estimating long-term (months to years) PM2.5 exposure in large-scale epidemiological and intervention studies of HAP.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23468847</pmid><doi>10.1371/journal.pone.0055670</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Adult Air pollution Air pollution measurements Air Pollution, Indoor Biology Biomass burning Burning Carbon monoxide Carbon Monoxide - analysis Chemistry Combustion Cooking Earth Sciences Engineering Epidemiology Exposure Feasibility studies Female Guatemala Health risks Households Humans Kitchens Longitudinal Studies Medicine Molecular Weight Outdoor air quality Particle Size Particulate emissions Particulate matter Particulate Matter - analysis Pollution Pollution effects Public health Public Health Surveillance Solid fuels Studies Wood |
| title | Longitudinal relationship between personal CO and personal PM2.5 among women cooking with woodfired cookstoves in Guatemala |
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