. Author manuscript; available in PMC: 2009 Aug 3.

Published in final edited form as: Environmetrics. 2008 Apr 24;20(2):131–146. doi: 10.1002/env.915

Table 2.

Mean (sd) of the daily ratios of the population mean exposure (averaged over all uncertainty runs) to daily average ambient concentration by season, weekday, and diameter.

Diameter	0.02µm	0.05µm	0.20µm	PM_2:5
Winter, weekday	0.27 (0.026)	0.36 (0.078)	0.44 (0.140)	0.65 (0.004)
Winter, weekend	0.23 (0.029)	0.33 (0.024)	0.40 (0.021)	0.66 (0.006)
Spring, weekday	0.30 (0.047)	0.39 (0.032)	0.45 (0.018)	0.64 (0.003)
Spring, weekend	0.27 (0.039)	0.36 (0.022)	0.42 (0.017)	0.65 (0.006)
Summer, weekday	0.34 (0.034)	0.46 (0.020)	0.52 (0.015)	0.76 (0.002)
Summer, weekend	0.38 (0.068)	0.49 (0.042)	0.53 (0.027)	0.79 (0.008)
Fall, weekday	0.23 (0.023)	0.32 (0.016)	0.38 (0.017)	0.62 (0.002)
Fall, weekend	0.27 (0.036)	0.35 (0.024)	0.41 (0.026)	0.64 (0.013)