Table 3 Logistic regression model with associations of smoking at the time of conception
Potential predictors | At the time of conception | |||
|---|---|---|---|---|
Smokers | Non-smokers | Crude OR | Adjusted ORa | |
n | n | OR (95% CI) | aOR (95% CI) | |
Overall respondents | 90 | 476 | ||
Age | ||||
18–24 | 17 | 38 | 1.9 (1.0–3.8) | 1.2 (0.6–2.5) |
25–29 | 35 | 149 | Ref | Ref. |
30–34 | 25 | 180 | 0.6 (0.3–1.0) | 0.6 (0.3–1.1) |
≥ 35 | 13 | 109 | 0.5 (0.3–1.0) | 0.5 (0.2–1.0) |
Missing data 0 | ||||
Parity | ||||
Nullipara | 44 | 178 | Ref. | Ref. |
Multipara | 46 | 297 | 0.6 (0.4–1.0) | 0.8 (0.5–1.3) |
Missing data 1 | ||||
Education | ||||
≤ 12 years | 60 | 403 | Ref. | Ref. |
> 12 years | 30 | 71 | 2.8 (1.7–4.7) | 2.2 (1.2–3.8) |
Missing data 2 | ||||
Work schedule | ||||
Day time | 63 | 402 | Ref. | Ref. |
Shift work | 27 | 74 | 2.3 (1.4–3.9) | 2.6 (1.5–4.6) |
Missing data 0 | ||||
Employment status | ||||
Employed | 71 | 438 | Ref. | Ref. |
Unemployed | 19 | 38 | 3.1 (1.7–5.6) | 3.2 (1.6–6.2) |
Missing data 0 | ||||
Cohabitation | ||||
Yes | 77 | 449 | Ref. | Ref. |
No | 12 | 27 | 2.6 (1.3–5.3) | 1.7 (0.7–3.8) |
Missing data 1 | ||||