Table 1. Baseline characteristics of participants according to pregnancy.
| No pregnancy | Pregnancy | |
| N | 7221 | 3180 |
| Person-years in follow-up period | ||
| 2–4 years | 13 638 | 2523 |
| 4–6 years | 23 347 | 4744 |
| 6–8 years | 27 983 | 6038 |
| 8–10 years | 32 067 | 6698 |
| 10–12 years | 30 939 | 5181 |
| 12–12 years | 13 143 | 1059 |
| Agea | 35.3 (8.5) | 28.4 (4.2) |
| BMIa | 22.2 (3.1) | 21.4 (2.6) |
| Exposure to computer (h/week)a | 13.6 (14.7) | 14.7 (15.8) |
| TV watching (h/week)a | 11.3 (9.1) | 12.2 (9.7) |
| Smoking status, n (%) | ||
| Current | 1649 (22.8) | 800 (25.2) |
| Former | 1865 (25.8) | 586 (18.4) |
| Total energy intake (Kcal./day)a | 2505.3 (892.1) | 2545.7 (991.3) |
| Outdoors physical activity (h/week)a | 5.2 (5.4) | 5.2 (5.8) |
| Sleeping <7 h/day, n (%) | 996 (13.8) | 364 (11.5) |
| Insomnia, n (%) | 920 (12.7) | 456 (14.3) |
| Alcohol intake (g/d)a | 4.1 (6.1) | 3.8 (5.2) |
| Mediterranean dietary score (0–8)a | 3.6 (1.5) | 3.5 (1.4) |
| Educational level, n (%) | ||
| Doctorate | 528 (7.3) | 137 (4.3) |
| Master | 528 (7.3) | 244 (7.6) |
| Postgraduate | 3227 (45.3) | 1525 (48.0) |
| College | 2173 (30.1) | 982 (30.9) |
| Others | 720 (10.0) | 292 (9.2) |
a
SD.