Table 1.
Traffic Pollutant Levels and Baseline Demographic Data of the Study Participants
| variable | overall | Near Dorm (N = 24) | Far Dorm (N = 29) |
|---|---|---|---|
| traffic pollutant levelsa | |||
| BC (μg/m3), mean (SD) | 0.91 (0.92) | 1.04 (0.63) | |
| CO (ppb), mean (SD) | 391 (101) | 246 (110) | |
| NO (ppb), mean (SD) | 22.8 (8.5) | 17.6 (8.0) | |
| NO2 (ppb), mean (SD) | 23.2 (7.8) | 23.3 (1.8) | |
| NOx (ppb), mean (SD) | 46.0 (16.1) | 40.9 (7.8) | |
| PM2.5 (μg/m3), mean (SD) | 13.0 (0.9) | 14.2 (1.7) | |
| demographic characteristics | |||
| age (SD) | 19.3 (0.8) | 19.2 (0.9) | 19.4 (0.8) |
| BMI (SD) | 23.1 (3.1) | 22.5 (3.2) | 23.6 (3.1) |
| gender, n (%) | |||
| female | 24 (45) | 12 (50) | 12 (41) |
| male | 29 (55) | 12 (50) | 17 (59) |
| race, n (%) | |||
| African American | 3 (6) | 1 (4) | 2 (7) |
| Asian | 17 (32) | 7 (29) | 10 (34) |
| Mexican | 1 (2) | 0 (0) | 1 (3) |
| White | 32 (60) | 16 (67) | 16 (56) |
| academic year, n (%) | |||
| freshman | 30 (57) | 16 (67) | 14 (48) |
| sophomore | 7 (13) | 4 (17) | 3 (10) |
| junior | 1 (2) | 1 (4) | 0 (0) |
| senior | 15 (28) | 3 (12) | 12 (41) |
| days in dorm prior to baseline, mean (SD) | 69 (119) | 87 (161) | 55 (67) |
a
Weekly average outdoor level at each site across the 4 weeks.