Table 1.
Demographic characteristics of the never-smoked study cohort.
| N = 37,650 | |
|---|---|
| Age at enrollment, Mean ± SD (Range) | 36.8 ± 10.5 (20, 70) |
| Body mass index, Mean ± SD (Range) | 27.6 ± 6.7 (14, 83) |
| Secondhand smoking, exposed at home | |
| Yes, no. (%) | 25,626 (68) |
| No, no. (%) | 12,024 (32) |
| Secondhand smoking, exposed at work | |
| Yes, no. (%) | 14,566 (39) |
| No, no. (%) | 23,084 (61) |
| Health insurance status | |
| Yes, no. (%) | 34,926 (93) |
| No, no. (%) | 2,724 (7) |
| Individual Education | |
| High school degree or less, no. (%) | 5,999 (16) |
| Some college no. (%) | 12,983 (34) |
| College or Graduate degree, no. (%) | 18,668 (50) |
| Individual Income, no. (%) | |
| <$25,000 | 4,528 (12) |
| $25,000 - <$50,000 | 11,691 (31) |
| $50,000 - <$100,000 | 14,835 (39) |
| $100,000 + | 6,596 (18) |
| PM2.5, Mean (SD) | 16.0 (3.8) |
| Neighborhood Concentrated Disadvantage Index, Mean ± SD (Range) | −0.55 ± 8.9 (−19.76, 79.61) |
| Neighborhood SES Index, Mean ± SD (Range) | 0.42 ± 9.4 (−30.36, 45.72) |
SD: standard deviation; PM2.5: particulate matter < 2.5 μm in diameter; SES: socioeconomic status.