Table 3 Odds ratios (OR) and 95% confidence intervals (CI) of public transportation modes of high urinary cotinine concentration (≥3.14 μg/g creatinine) compared to low urinary cotinine concentration
From: Female non-smokers’ environmental tobacco smoking exposure by public transportation mode
| Category | OR(95% CI) | |
|---|---|---|
| Model 1a | ||
| Subway | Reference | |
| Bus | 1.30(0.87–1.95) | |
| Taxi | 2.39(1.00–5.69) | |
| Model 2b | ||
| Subway | Reference | |
| Bus | 1.21(0.80–1.84) | |
| Taxi | 2.42(0.97–6.04) | |