Table 1.
Characteristics of women with pre-eclampsia or no pre-eclampsia before and during pregnancy. Values are numbers (percentages) unless stated otherwise
| Characteristics | Pre-eclampsia group (n=133) | No pre-eclampsia group (n=3361) |
|---|---|---|
| Mean (SD) age at baseline (years) | 25.4 (4.5) | 26.7 (4.5) |
| Mean (SD) years from baseline to delivery | 4.0 (2.2) | 3.5 (2.1) |
| Mean (SD) maternal age at delivery (years) | 29.3 (4.4) | 30.2 (4.4) |
| Prepregnancy diabetes* | 2 (2.6) | 9 (0.3) |
| Prepregnancy hypertension† | 6 (4.5) | 34 (1.0) |
| Previous pre-eclampsia‡ | 15 (31.2) | 106 (5.4) |
| Parity: | ||
| 0 | 85 (63.9) | 1403 (41.7) |
| 1 | 26 (19.5) | 946 (28.1) |
| ≥2 | 22 (16.5) | 1012 (30.1) |
| Gestational age (weeks): | ||
| <33 | 15 (11.3) | 49 (1.4) |
| 34-36 | 21 (15.7) | 124 (3.7) |
| >37 | 97 (72.3) | 3188 (94.9) |
| Median (interquartile range) gestational age (days) | 272 (27) | 281 (15) |
| Median (interquartile range) birth weight (kg) | 3.3 (1.0) | 3.6 (0.7) |
| Small for gestational age (<10 centile) | 24 (18.0) | 291 (8.6) |
*Nine women had type 1 diabetes and two had type 2 diabetes.
†Hypertension defined as blood pressure above 140/90 (mm Hg). One woman received antihypertensive treatment.
‡Percentage among those with a previous birth.