Table 2 Characteristics of the intervention cohort (N = 2051) and the control cohort (N = 1788) at inclusion n = number of participants included in analysis
Intervention cohort | Control cohort | |||||||
|---|---|---|---|---|---|---|---|---|
n | % | 95% CI | n | % | 95% CI | p-value | ||
Single mother* | 1072 | 1.9 | 1.1–2.7 | 994 | 3.8 | 2.6–5.0 | 0.01 | |
Primiparous | 2051 | 56.6 | 54.5–58.7 | 1785 | 48.6 | 46.3–50.9 | <0.001 | |
n | mean | SD | n | mean | SD | |||
Maternal age (years) | 2044 | 28.6 | 4.6 | 1766 | 28.8 | 4.7 | 0.14 | |
Maternal education (years)† | 283 | 16.1 | 2.2 | 514 | 15.8 | 2.3 | 0.05 | |
Paternal education† | 289 | 15.4 | 2.7 | 523 | 15.2 | 2.9 | 0.34 | |
No. of cig. a day among smokers at the beginning of pregnancy | Mother | 462 | 8.6 | 7.9 | 475 | 8.0 | 6.1 | 0.19 |
Father | 438 | 9.8 | 8.3 | 413 | 9.6 | 6.7 | 0.68 | |
No. of cig. a day among smokers at inclusion | Mother | 140 | 5.3 | 7.4 | 184 | 4.9 | 4.0 | 0.57 |
Father | 355 | 8.8 | 8.6 | 356 | 8.2 | 6.4 | 0.27 | |