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Predictors of indoor particulate matter and carbon monoxide concentrations in households of an informal urban settlement in Fort Portal city, Uganda

Article scientifique 2022 Anglais

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Abstract Background: Poor indoor air quality (IAQ) is a leading cause of respiratory and cardiopulmonary illnesses. Particulate matter (PM2.5) and carbon monoxide (CO) are critical indicators of IAQ, yet there is limited evidence of their concentrations in informal urban settlements in low-income countries. Objective: This study assessed household characteristics that predict the concentrations of PM2.5 and CO within households in an informal settlement in Fort Portal City, Uganda.Methodology: We conducted a cross-sectional study in 374 households. Concentrations of PM2.5 and CO were measured using a Multi-purpose Laser Particle detector and the Carbon Monoxide IAQ Meter, respectively. Data on household characteristics were collected using a structured questionnaire and an observational checklist. Data were analyzed using STATA version 14.0. Linear regression was used to establish the relationship between PM2.5, CO concentrations, and household characteristics.Results: The majority, 88.8% (332/374) of the households, used charcoal for cooking. More than half, 51.9% (194/374), cooked outdoors. Cooking areas had significantly higher PM2.5 and CO concentrations compared to the living area (t=18.14, p ≤ 0.05) and (t=5.77 p ≤ 0.05), respectively. Cooking from outdoors was associated with a 0.112 increase in the PM2.5 concentrations in the cooking area (0.112 [95% CI: -0.069, 1.614; p= 0.033]). Cooking with moderately polluting fuel was associated with a 0.718 increase in CO concentrations (0.718 [95% CI: 0.084, 1.352; p= 0.027]) in the living area.Discussion: The concentration of PM2.5 and CO during the cooking time for both the cooking area and the living area were above the World Health Organization Air Quality Guideline of 25μg/m3 and 7ppm for 24 hours, respectively. Interventions to improve indoor air quality in informal settlements should address changes in cooking fuel types and enhance air quality.

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Kansiime, W., Mugambe, R., Atusingwize, E., Wafula, S., Nsereko, V., Ssekamatte, T., Nalugya, A., Coker, E., Ssempebwa, J., Isunju, J. (2022). Predictors of indoor particulate matter and carbon monoxide concentrations in households of an informal urban settlement in Fort Portal city, Uganda. https://doi.org/10.21203/rs.3.rs-1509952/v1

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