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Fig. 1 | Environmental Health

Fig. 1

From: Low concentrations of fine particle air pollution and mortality in the Canadian Community Health Survey cohort

Fig. 1

Flowchart of CCHS-Mortality cohort creation from linkage of survey to mortality and mobility history to person-year based analytical filea. anumbers rounded to the nearest 100 for confidentiality. bresponse rates: 2000/2001 (Cycle 1.1) 84.7%, 2003 (Cycle 2.1) 80.7%, 2005 (Cycle 3.1) 78.9%, 2007/2008 (Cycle 4.1) 76.4%, 2009/2010 72.3%, 2011/2012 68.4%. crespondents who agreed to data linkage: 2000/2001 (Cycle 1.1) n = 117,800, 2003 (Cycle 2.1) n = 112,900, 2005 (Cycle 3.1) n = 113,900, 2007/2008 (Cycle 4.1) n = 112,700, 2009/2010 n = 104,700, 2011/2012 n = 104,100. dlinkage rate of respondents who agreed to linkage to the SDLE DRD: 95.2%. elinkage rate of relevant deaths to the SDLE DRD: 99.8%. fsee methods for list of exclusion criteria, totals will exceed number of deleted person-years given that more than one exclusion criteria may apply to a single person-year; immigrated to Canada less than 10 years before survey date n = 541,600, age during follow-up period exceeds 89 years n = 161,000, no postal code n = 5,009,900, could not be linked to air pollution values n = 5,711,600, could not be linked to Can-MARG values n = 7,668,000, could not be linked to Census Metropolitan Area/Census Agglomeration size n = 4,800,600, could not be linked to airshed n = 3500, 3-year moving average being informed by only 1 year of exposure n = 4,321,500, year after subject death n = 343,600, year before survey interview date n = 13,570,300. gfrom 452,700 unique individuals

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