International Journal of Health Geographics

Table 1 Descriptive statistics of the exposure estimate distributions in the 382 census tracts in the Greater Vancouver Regional District study area

From: Spatial variations in estimated chronic exposure to traffic-related air pollution in working populations: A simulation

Exposure estimates		Annual average hourly NO₂ (μg/m³)
Descriptive statistics		10^th percentile (n = 382)	50^th percentile (n = 382)	90^th percentile (n = 382)	Range (10^th – 90th)
Total exposure	Mean	18.87	20.96	23.89	5.02
	Median	18.61	20.62	23.58
	st. deviation	3.24	3.48	3.49
Home indoor	Mean	14.88	15.39	15.89	1.01
	Median	14.48	15.00	15.47
	st. deviation	3.50	3.63	3.76
Work indoor	Mean	3.79	6.40	10.60	6.81
	Median	3.72	6.39	10.52
	st. deviation	0.37	0.64	0.76
Other indoor	Mean	1.76	2.09	2.44	0.68
	Median	1.67	1.99	2.35
	st. deviation	0.43	0.50	0.58
Outdoor	Mean	2.36	2.78	3.24	0.88
	Median	2.39	2.82	3.28
	st. deviation	0.36	0.42	0.49
In-vehicle to work	Mean	0.19	0.54	1.06	0.87
	Median	0.16	0.52	0.99
	st. deviation	0.15	0.24	0.36
In-vehicle other	Mean	1.32	1.53	1.76	0.44
	Median	1.33	1.54	1.77
	st. deviation	0.18	0.21	0.25

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ISSN: 1476-072X

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