{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T17:47:40Z","timestamp":1779904060339,"version":"3.53.1"},"reference-count":0,"publisher":"International Union Against Tuberculosis and Lung Disease","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["int j tuberc lung dis"],"published-print":{"date-parts":[[2021,3,1]]},"abstract":"<jats:p><jats:bold>BACKGROUND:<\/jats:bold> Scientific understanding of indoor air pollution is predominately based on research carried out in cities in high\u2010income countries (HICs). Less is known about how pollutant concentrations change over the course of a typical day in cities in low\u2010 and\n middle\u2010income countries (LMICs).<jats:bold>OBJECTIVE:<\/jats:bold> To understand how concentrations of fine particulate matter smaller than 2.5 microns in diameter (PM<jats:sub>2.5<\/jats:sub>) change over the course of the day outdoors (across a range of countries) and indoors (using measurements from Dhaka,\n Bangladesh).<jats:bold>DESIGN:<\/jats:bold> Data on PM<jats:sub>2.5<\/jats:sub> concentrations were gathered from 779 households in Dhaka as part of the MCLASS II (Muslim Communities Learning About Second\u2010hand Smoke in Bangladesh) project, and compared to outdoor PM<jats:sub>2.5<\/jats:sub> concentrations to determine\n the temporal variation in exposure to air pollution. Hourly PM<jats:sub>2.5<\/jats:sub> data from 23 cities in 14 LMICs, as well as London (UK), Paris (France) and New York (NY, USA), were extracted from publicly available sources for comparison.<jats:bold>RESULTS:<\/jats:bold> PM<jats:sub>2.5<\/jats:sub> in homes in Dhaka\n demonstrated a similar temporal pattern to outdoor measurements, with greater concentrations at night than in the afternoon. This pattern was also evident in 19 of 23 LMIC cities.<jats:bold>CONCLUSION:<\/jats:bold> PM<jats:sub>2.5<\/jats:sub> concentrations are greater at night than during the afternoon in homes\n in Dhaka. Diurnal variations in PM<jats:sub>2.5<\/jats:sub> in LMICs is substantial and greater than in London, Paris or New York. This has implications for public health community approaches to health effects of air pollution in LMICs.<\/jats:p>","DOI":"10.5588\/ijtld.20.0704","type":"journal-article","created":{"date-parts":[[2021,3,10]],"date-time":"2021-03-10T16:38:01Z","timestamp":1615394281000},"page":"206-214","source":"Crossref","is-referenced-by-count":15,"title":["Diurnal variability of fine-particulate pollution concentrations: data from 14 low- and middle-income countries"],"prefix":"10.5588","volume":"25","author":[{"given":"R.","family":"Dobson","sequence":"first","affiliation":[{"name":"Institute for Social Marketing and Health, University of Stirling, Stirling, Scotland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"Siddiqi","sequence":"additional","affiliation":[{"name":"Department of Health Sciences, University of York, York, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"T.","family":"Ferdous","sequence":"additional","affiliation":[{"name":"Advancement through Research and Knowledge Foundation Bangladesh, Dhaka, Bangladesh"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R.","family":"Huque","sequence":"additional","affiliation":[{"name":"Advancement through Research and Knowledge Foundation Bangladesh, Dhaka, Bangladesh"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Lesosky","sequence":"additional","affiliation":[{"name":"Division of Epidemiology & Biostatistics, School of Public Health & Family Medicine, University of Cape Town, Cape Town, South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Balmes","sequence":"additional","affiliation":[{"name":"Department of Medicine, University of California, San Francisco, CA, School of Public Health, University of California, Berkeley, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"Semple","sequence":"additional","affiliation":[{"name":"Institute for Social Marketing and Health, University of Stirling, Stirling, Scotland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"3554","container-title":["The International Journal of Tuberculosis and Lung Disease"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ingentaconnect.com\/content\/iuatld\/ijtld\/2021\/00000025\/00000003\/art00006","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,12,8]],"date-time":"2021-12-08T04:32:36Z","timestamp":1638937956000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ingentaconnect.com\/content\/10.5588\/ijtld.20.0704"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,3,1]]},"references-count":0,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2021,3,1]]}},"alternative-id":["1027-3719(20210301)25:3L.206;1-"],"URL":"https:\/\/doi.org\/10.5588\/ijtld.20.0704","relation":{},"ISSN":["1027-3719"],"issn-type":[{"value":"1027-3719","type":"print"}],"subject":[],"published":{"date-parts":[[2021,3,1]]}}}