Comparability of groups of women given the booklet and controls; values are per cent
| Treated (n=103) | Controls (n=97) | |
|---|---|---|
| Maternal age at delivery (years) | ||
| < 20 | 1.0 | 0 |
| 20-24 | 14.5 | 11.4 |
| 25-29 | 40.8 | 43.3 |
| 30-34 | 36.9 | 31.9 |
| 35-39 | 4.9 | 12.4 |
| ⩾ 40 | 1.9 | 1.0 |
| Infant’s sex | ||
| Male | 41.7 | 50.6 |
| Female | 58.3 | 49.4 |
| Birth weight (g) | ||
| Median (interquartile range) | 3300 (3100-3510) | 3270 (3080-3540) |
| 2500-2999 | 12.6 | 15.5 |
| 3000-3499 | 60.2 | 55.7 |
| ⩾ 3500 | 27.2 | 28.8 |
| Gestational age (weeks) | ||
| Median (interquartile range) | 40 (39-42) | 40 (39-42) |
| < 37 | 3.9 | 4.1 |
| ⩾ 37 | 96.1 | 95.9 |
| Type of delivery | ||
| Vaginal | 75.7 | 81.4 |
| Caesarean section | 24.3 | 18.6 |
| Smoking | ||
| During pregnancy | 15.6 | 21.6 |
| During breast feeding | 4.8 | 11.3 |
| Follow up | ||
| Performed by well baby outpatient clinic | 25.2 | 27.8 |
| Performed outside | 74.8 | 72.2 |