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Table 2 Descriptive statistics of ecological covariates derived from the 2001 and 2006 Censusa

From: Risk estimates of mortality attributed to low concentrations of ambient fine particulate matter in the Canadian community health survey cohort

   Percentile   Correlation with mean PM2.5
Variable Min 5th 25th 50th 75th 95th Max
Aggregated by Dissemination Area         
  % recent immigrants 0.0 0.0 0.0 0.0 1.7 9.0 69.0 0.303
  % completed high school 0.0 47.4 63.6 73.5 82.4 92.3 100.0 0.245
  % in low income families 0.0 1.5 5.9 10.9 18.4 35.1 100.0 0.235
Aggregated by Census Division         
  % recent immigrants 0.0 0.1 0.3 0.7 1.9 9.5 16.7 0.424
  % completed high school 31.2 52.3 65.8 72.7 78.6 85.1 88.6 0.462
  % in low income families 3.4 7.8 10.5 12.9 15.3 21.1 37.1 0.192
  1. aSource: 2001 or 2006 Census data were chosen based on the closest year to the Cohort entry