Table 2.
Baseline characteristics of women enrolled in the Diabetes & Women’s Health Study: The Danish National Birth Cohort (DNBC) site (1996–2002) (n=790)
| Characteristic at DNBC index pregnancy | n | Mean (SD) or (%) |
| Age, years | 790 | 31.6 (4.5) |
| <25 | 35 | (4.4) |
| 25–29 | 219 | (27.7) |
| 30–34 | 333 | (42.2) |
| 35–39 | 175 | (22.2) |
| ≥40 | 28 | (3.5) |
| Cohabitation status | ||
| Not living with a partner | 13 | (1.7) |
| Living with a partner | 716 | (90.6) |
| Missing | 61 | (7.7) |
| Parity | ||
| Nulliparous | 293 | (37.1) |
| Multiparous | 436 | (55.2) |
| Unknown | 61 | (7.7) |
| Current smoker | ||
| No | 553 | (70.0) |
| Yes | 209 | (26.5) |
| Missing | 28 | (3.5) |
| Socio-economic status | ||
| High-level professional | 148 | (18.7) |
| Medium-level professional | 219 | (27.7) |
| Skilled worker | 214 | (27.1) |
| Student | 22 | (2.8) |
| Unskilled worker | 113 | (14.3) |
| Unemployed | 10 | (1.3) |
| Missing | 64 | (8.1) |
| Prepregnancy body mass index, kg/m2 | 735 | 27.5 (5.8) |
| <18.5 | 10 | (1.3) |
| 18.5–24.9 | 289 | (36.6) |
| 25.0–29.9 | 212 | (26.8) |
| 30.0–34.9 | 141 | (17.9) |
| 35.0–39.9 | 63 | (8.0) |
| ≥40.0 | 20 | (2.5) |
| Missing | 55 | (7.0) |