Table 2 Crude and adjusted odds ratios (OR) for low birth weight by pollution exposure
From: Maternal exposure to low-level air pollution and pregnancy outcomes: a population-based study
Exposure | Crude odds ratio | Adjusted* odds ratio | Adjusted† odds ratio |
|---|---|---|---|
OR (95%CI) | OR (95%CI) | OR (95%CI) | |
Formaldehyde Categorical variable (tertiles) | |||
1 (reference) | |||
2 | 1.27 (0.82–1.95) | 1.86 (1.10–3.16) | 2.15 (0.96–4.81) |
3 | 1.39 (0.91–2.12) | 1.84 (1.12–3.03) | 2.09 (1.03–4.26) |
Continuous variable (per 5 μg/m3 increase in concentration) | |||
1.07 (0.74–1.53) | 1.10 (0.75–1.64) | 1.36 (0.75–2.47) | |
Nitrogen dioxide Categorical variable (tertiles) | |||
1 (reference) | |||
2 | 0.95 (0.61–1.47) | 1.11 (0.70–1.77) | 0.96 (0.47–1.96) |
3 | 1.37 (0.91–2.07) | 1.64 (1.04–2.58) | 1.54 (0.80–2.96) |
Continuous variable (per 10 μg/m3 increase in concentration) | |||
1.15 (0.97–1.36) | 1.23 (1.02–1.48) | 1.28 (0.97–1.68) | |