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- W4366204550 abstract "Background: Cooking and heating in households contribute importantly to air pollution exposure worldwide. However, there is insufficient investigation of measured fine particulate matter (PM 2.5 ) exposure levels, variability, seasonality, and inter-spatial dynamics associated with these behaviours. Methods: We undertook parallel measurements of personal, household (kitchen and living room), and community PM 2.5 in summer (May-September 2017) and winter (November 2017-Janauary 2018) in ~480 participants from one urban and two rural communities in China. These recorded ~61,000-81,000 person-hours of processed data per microenvironment. Age- and sex-adjusted geometric means of PM 2.5 were calculated by key participant characteristics, overall and by season. Spearman correlation coefficients between PM 2.5 levels across different microenvironments were computed. Findings: Overall, 25.1% reported use of solid fuel for both cooking and heating. Solid fuel users had ~90% higher personal and kitchen 24-hour average PM 2.5 exposure than clean fuel users. Similarly, they also had a greater increase (~75% vs ~20%) in personal and household PM 2.5 from summer to winter, whereas community levels of PM 2.5 were 2-3 times higher in winter regardless of fuel use. Compared with clean fuel users, solid fuel users had markedly higher weighted annual average PM 2.5 exposure at personal (77.8 [95% CI 71.1-85.2] vs ~40 µg/m 3 ), kitchen (103.7 [91.5-117.6] vs ~50 µg/m 3 ) and living room (62.0 [57.1-67.4] vs ~40 µg/m 3 ) microenvironments. There was a remarkable diurnal variability in PM 2.5 exposure among the participants, with 5-minute moving average 700-1,200µg/m 3 in typical meal times. Personal PM 2.5 was moderately correlated with living room (Spearman r: 0.64-0.66) and kitchen (0.52-0.59) levels, but only weakly correlated with community levels, especially in summer (0.15-0.34) and among solid fuel users (0.11-0.31). Conclusion: Solid fuel use for cooking and heating was associated with substantially higher personal and household PM 2.5 exposure than clean fuel users. Household PM 2.5 appeared a better proxy of personal exposure than community PM 2.5 in this setting." @default.
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- W4366204550 date "2023-04-17" @default.
- W4366204550 modified "2023-09-25" @default.
- W4366204550 title "Characterising personal, household, and community PM<sub>2.5</sub>exposure in one urban and two rural communities in China" @default.
- W4366204550 doi "https://doi.org/10.1101/2023.04.10.23288228" @default.
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