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ABSTRACT: Background
Household air pollution from solid fuel burning is a leading contributor to disease burden globally. Fine particulate matter (PM2.5) is thought to be responsible for many of these health impacts. A co-pollutant, carbon monoxide (CO) has been widely used as a surrogate measure of PM2.5 in studies of household air pollution.Objective
The goal was to evaluate the validity of exposure to CO as a surrogate of exposure to PM2.5 in studies of household air pollution and the consistency of the PM2.5-CO relationship across different study settings and conditions.Methods
We conducted a systematic review of studies with exposure and/or cooking area PM2.5 and CO measurements and assembled 2,048 PM2.5 and CO measurements from a subset of studies (18 cooking area studies and 9 personal exposure studies) retained in the systematic review. We conducted pooled multivariate analyses of PM2.5-CO associations, evaluating fuels, urbanicity, season, study, and CO methods as covariates and effect modifiers.Results
We retained 61 of 70 studies for review, representing 27 countries. Reported PM2.5-CO correlations (r) were lower for personal exposure (range: 0.22-0.97; median=0.57) than for cooking areas (range: 0.10-0.96; median=0.71). In the pooled analyses of personal exposure and cooking area concentrations, the variation in ln(CO) explained 13% and 48% of the variation in ln(PM2.5), respectively.Conclusions
Our results suggest that exposure to CO is not a consistently valid surrogate measure of exposure to PM2.5. Studies measuring CO exposure as a surrogate measure of PM exposure should conduct local validation studies for different stove/fuel types and seasons. https://doi.org/10.1289/EHP767.
SUBMITTER: Carter E
PROVIDER: S-EPMC5744652 | biostudies-literature | 2017 Jul
REPOSITORIES: biostudies-literature
Carter Ellison E Norris Christina C Dionisio Kathie L KL Balakrishnan Kalpana K Checkley William W Clark Maggie L ML Ghosh Santu S Jack Darby W DW Kinney Patrick L PL Marshall Julian D JD Naeher Luke P LP Peel Jennifer L JL Sambandam Sankar S Schauer James J JJ Smith Kirk R KR Wylie Blair J BJ Baumgartner Jill J
Environmental health perspectives 20170728 7
<h4>Background</h4>Household air pollution from solid fuel burning is a leading contributor to disease burden globally. Fine particulate matter (PM<sub>2.5</sub>) is thought to be responsible for many of these health impacts. A co-pollutant, carbon monoxide (CO) has been widely used as a surrogate measure of PM<sub>2.5</sub> in studies of household air pollution.<h4>Objective</h4>The goal was to evaluate the validity of exposure to CO as a surrogate of exposure to PM<sub>2.5</sub> in studies of ...[more]