Table 1.
Population characteristics
| Characteristics | Term preeclampsia (≥37 weeks) n=716 (%) |
Term controls (≥37 weeks) n=66 373 (%) |
OR (95% CI) |
P value |
| Maternal age (SD) | 28.3±7.0 | 27.7±6.5 | Difference 0.6 year |
0.01 |
| Parity ±SD | 1.1±1.7 | 1.28±1.5 | 0.03 | |
| Primiparity | 382 (53.4) | 24 437 (37.1) | 1.94 (1.7 to 2.25) |
<0.0001 |
| Women living single | 283 (39.6) | 23 579 (36.0) | 1.16 (1.0 to 1.35) |
0.05 |
| Education >10 years | 408 (59.2) | 36 862 (58.1) | 1.06 | 0.21 |
| Unemployed | 479 (66.9) | 45 730 (68.9) | 0.92 | 0.12 |
| Origin Reunion Island | 590 (82.3) | 54 425 (82.2) | ||
| BMI (mean±SD, kg/m2) | 27.4±7.35 n=684 |
24.7±5.9 n=63 423 |
Difference 2.7 kg/m² |
<0.0001 |
| Obesity ≥30 kg/m² | 217 (31.7) | 10 908 (17.2) | 2.24 (1.9 to 2.6) |
<0.0001 |
| BMI categories | <0.0001 | |||
| ≤19 (underweight) | 82 (11.9) | 13 342 (21.0) | ||
| 20–24 (normal) | 233 (34.1) | 25 502 (40.2) | ||
| 25–29 overweight | 152 (22.2) | 13 671 (21.6) | ||
| 30–34 (obesity I) | 104 (15.2) | 6671 (10.1) | ||
| 35–39 (obesity II) | 70 (10.2) | 2841 (4.5) | ||
| >40 (obesity III) | 43 (6.3) | 1396 (2.2) | ||
| Smoking | 59 (8.3) | 8031 (12.1) | 0.65 (0.49 to 0.85) |
0.001 |
| No of prenatal visits | 9.0±2.76 | 9.0±2.73 | NS | |
| No of ultrasonographies | 4.7±1.7 | 4.4±1.7 | 0.003 | |
| Weight gain (kg) | 14.3±7.3 n=622 |
12.1±6.2 n=58 287 |
Difference 2.2 kg |
<0.0001 |
| Gestational diabetes | 100 (14.3) | 7061 (10.8) | 1.37 (1.1 to 1.69) |
0.004 |
| Chronic hypertension | 56 (7.8) | 829 (1.3) | 6.6 (5.0 to 8.8) |
<0.0001 |
| Delivery (weeks) | 38.2±1.1 | 38.9±1.1 | Difference 0.7 week |
<0.0001 |
Term pregnancies ≥37 weeks gestation.
BMI, body mass index.