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

Table 2 Descriptive statistics of ecological covariates derived from the 2001 and 2006 Census^a

		Percentile						Correlation with mean PM_2.5
Variable	Min	5th	25th	50th	75th	95th	Max	Correlation with mean PM_2.5
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

^aSource: 2001 or 2006 Census data were chosen based on the closest year to the Cohort entry

ISSN: 1476-069X