Table 2 Air pollution exposure measurements, as calculated from means of each trial
From: Particulate matter exposure and health impacts of urban cyclists: a randomized crossover study
Pollutanta | Downtown route | Residential route | Ratio of downtown: residential routeb | 95% CI of the downtown – residential difference | ||||
|---|---|---|---|---|---|---|---|---|
Mean [SD] | Median; range (min, max) | GM [GSD] | Mean [SD] | Median; range (min, max) | GM [GSD] | |||
PNC (pt/cm³) | 16,870 [4838] | 15,740 (9597, 29,060) | 16,226 [1.33] | 10,840 [5159] | 10,280 (977, 22,130) | 9367 [1.86] | 1.53 | 3695, 8376 |
PM1 (μg/m3) | 5.0 [4.2] | 3.7 (1.2, 20) | 3.8 [2.0] | 3.8 [2.9] | 2.9 (0.48, 12) | 2.9 [2.1] | 1.3 | −0.44, 2.9 |
PM2.5 (μg/m3) | 7.3 [5.3] | 5.5 (2.4, 24) | 6.0 [1.9] | 5.8 [3.7] | 4.4 (1.1, 15) | 4.7 [1.9] | 1.3 | −0.58, 3.6 |
PM10 (μg/m3) | 13 [7.3] | 11 (4.3, 33) | 11 [1.8] | 9.9 [5.6] | 8.8 (2.2, 29) | 8.4 [1.8] | 1.2 | −0.14, 5.9 |