Table 3.

Associations of daily community-level exposure (by outdoor urban monitors) with personal daily exposure (by PAM)

Community-Level Exposure	n (obs)	Difference (95% CI) in Personal Exposure	P Value
PM2.5, per 10 μg/m3	2,803	2.0 (0.9–3.2)	0.0004
O3, per 10 ppb	2,789	0.6 (0.5–0.8)	<0.0001
NO2, per 10 ppb	2,803	1.0 (0.6–1.3)	<0.0001
Temperature, per 10°C	2,803	1.0 (0.9–1.1)	<0.0001
Humidity, per 10%	2,803	1.9 (1.7–2.1)	<0.0001

Definition of abbreviations: CI = confidence interval; n (obs) = number of observations; NO₂ = nitrogen dioxide; O₃ = ozone; PAM = personal air quality monitor; PM_2.5 = particulate matter ⩽2.5 μm in aerodynamic diameter; ppb = parts per billion.

Results are from unadjusted linear mixed effects models of associations between daily averages of community-level exposure to each pollutant, temperature, or humidity with personal exposure to the corresponding pollutant, temperature, or humidity, scaled per 10-unit increase in community-level exposure.