Longitudinal Relationship between Personal CO and Personal PM2.5 among Women Cooking with Woodfired Cookstoves in Guatemala
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{"title"=>"Longitudinal Relationship between Personal CO and Personal PM2.5 among Women Cooking with Woodfired Cookstoves in Guatemala", "type"=>"journal", "authors"=>[{"first_name"=>"John P.", "last_name"=>"McCracken", "scopus_author_id"=>"7103300854"}, {"first_name"=>"Joel", "last_name"=>"Schwartz", "scopus_author_id"=>"7404276367"}, {"first_name"=>"Anaite", "last_name"=>"Diaz", "scopus_author_id"=>"7201946588"}, {"first_name"=>"Nigel", "last_name"=>"Bruce", "scopus_author_id"=>"7102846570"}, {"first_name"=>"Kirk R.", "last_name"=>"Smith", "scopus_author_id"=>"7410184308"}], "year"=>2013, "source"=>"PLoS ONE", "identifiers"=>{"isbn"=>"1932-6203 (Electronic)\\r1932-6203 (Linking)", "scopus"=>"2-s2.0-84874466012", "sgr"=>"84874466012", "pui"=>"368439023", "doi"=>"10.1371/journal.pone.0055670", "pmid"=>"23468847", "issn"=>"19326203"}, "id"=>"7bbd0d23-b4de-3956-b7e7-9d372d552b3a", "abstract"=>"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<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.", "link"=>"http://www.mendeley.com/research/longitudinal-relationship-between-personal-co-personal-pm25-among-women-cooking-woodfired-cookstoves", "reader_count"=>47, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Professor > Associate Professor"=>3, "Student > Doctoral Student"=>1, "Researcher"=>12, "Student > Ph. D. Student"=>14, "Student > Master"=>6, "Other"=>2, "Student > Bachelor"=>2, "Lecturer"=>2, "Lecturer > Senior Lecturer"=>3, "Professor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Professor > Associate Professor"=>3, "Student > Doctoral Student"=>1, "Researcher"=>12, "Student > Ph. D. Student"=>14, "Student > Master"=>6, "Other"=>2, "Student > Bachelor"=>2, "Lecturer"=>2, "Lecturer > Senior Lecturer"=>3, "Professor"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>3, "Unspecified"=>6, "Environmental Science"=>24, "Agricultural and Biological Sciences"=>3, "Medicine and Dentistry"=>4, "Pharmacology, Toxicology and Pharmaceutical Science"=>1, "Social Sciences"=>2, "Earth and Planetary Sciences"=>4}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>3}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>4}, "Social Sciences"=>{"Social Sciences"=>2}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>4}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>3}, "Unspecified"=>{"Unspecified"=>6}, "Environmental Science"=>{"Environmental Science"=>24}, "Pharmacology, Toxicology and Pharmaceutical Science"=>{"Pharmacology, Toxicology and Pharmaceutical Science"=>1}}, "reader_count_by_country"=>{"United States"=>1, "United Kingdom"=>1}, "group_count"=>5}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/1010937"], "description"=>"*<p>Stove by CO interaction effect = −0.00 (−0.22, 0.22).</p>", "links"=>[], "tags"=>["estimates", "variance", "components", "linear", "24-hour", "measures", "116"], "article_id"=>671344, "categories"=>["Medicine", "Chemistry", "Biotechnology"], "users"=>["John P. McCracken", "Joel Schwartz", "Anaite Diaz", "Nigel Bruce", "Kirk R. Smith"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055670.t001", "stats"=>{"downloads"=>3, "page_views"=>15, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Effect_estimates_95_confidence_intervals_and_variance_components_from_linear_mixed_effects_models_to_predict_natural_log_personal_PM_2_5_216_24_hour_exposure_measures_among_116_subjects_/671344", "title"=>"Effect estimates (95% confidence intervals) and variance components from linear mixed effects models to predict natural log personal PM<sub>2.5</sub> (216 24-hour exposure measures among 116 subjects).", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-02-26 00:22:24"}
  • {"files"=>["https://ndownloader.figshare.com/files/971073"], "description"=>"<p>Lines for each stove type (red for open fire, blue for chimney stove) using equation PM<sub>2.5</sub> = e<sup>(<b>−2.13+0.61*ln(CO) − 0.36*chimney</b>)</sup> estimated from linear mixed effects regression model with natural log-transformed exposures (216 measurements among 116 women).</p>", "links"=>[], "tags"=>["simultaneous", "24-hour", "particles", "carbon", "monoxide"], "article_id"=>640151, "categories"=>["Medicine", "Chemistry", "Biotechnology"], "users"=>["John P. McCracken", "Joel Schwartz", "Anaite Diaz", "Nigel Bruce", "Kirk R. Smith"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055670.g001", "stats"=>{"downloads"=>3, "page_views"=>42, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Scatter_plot_of_simultaneous_24_hour_personal_fine_particles_PM_2_5_and_personal_carbon_monoxide_CO_/640151", "title"=>"Scatter plot of simultaneous 24-hour personal fine particles (PM<sub>2.5</sub>) and personal carbon monoxide (CO).", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-27 08:17:55"}

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Relative Metric

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