Skip to main content

Advertisement

Table 4 Ambient exposure estimates derived from NAPS monitors within 50 km of residential postal codes and spatiotemporal exposure models.

From: Spatiotemporal air pollution exposure assessment for a Canadian population-based lung cancer case-control study

Pollutant N* Mean SD Min IQR Max
NAPS Measurements ≤ 50 km
TSP (μg/m3) 4027 60.0 16.9 22.3 21.4 114.1
Modeled PM2.5 (μg/m3)a 4027 17.0 2.5 11.9 3.4 25.7
NO2 (ppb) 3649 23.4 6.0 6.0 7.6 37.8
O3 (ppb)b 4382 21.0 3.9 7.0 5.3 32.6
Spatiotemporal IDW Interpolation
PM2.5 (μg/m3) 6833 11.3 2.6 3.6 3.9 19.0
NO2 (ppb) 6919 15.3 8.8 1.1 14.5 43.4
O3 b(ppb) 6919 23.2 3.7 12.9 4.6 35.4
Linear Regression Models
PM2.5 (μg/m3) 6833 9.1 1.9 4.7 2.2 16.1
NO2 (ppb) 6919 17.7 4.1 13.1 5.0 35.1
O3 b (ppb) 6919 26.4 3.4 18.1 4.7 37.2
  1. *Number of individuals with ≥ 15 complete exposure-years
  2. a Modeled using TSP and CMA indicator variables as described previously in Table 1
  3. b Summer (May through September) O3