Table 2. Crude OR (95% CI) From Logistic Regression Analysis.
| Preeclampsia, crude OR (95% CI) | ||||
|---|---|---|---|---|
| Mild | Severe | |||
| Variable | Sweden | Chinaa | Sweden | Chinaa |
| Maternal age at delivery ≥35 | 1.07 (1.02-1.13) | 2.06 (1.22-3.48) | 1.14 (1.06-1.22) | 2.04 (1.59-2.63) |
| BMIb | ||||
| Underweight | 0.76 (0.63-0.91) | 0.41 (0.18-0.92) | 0.78 (0.62-0.99) | 0.66 (0.45-0.95) |
| Overweight | 1.71 (1.63-1.80) | 3.14 (1.98-4.99) | 1.35 (1.26-1.45) | 2.29 (1.59-3.30) |
| Obese | 3.23 (3.07-3.40) | 4.86 (3.64-6.51) | 2.10 (1.94-2.27) | 4.46 (3.27-6.07) |
| Nulliparous | 2.49 (2.39-2.59) | 1.40 (0.88-2.22) | 3.31 (3.10-3.53) | 1.20 (0.92-1.55) |
| Multiple gestation | 4.42 (4.04-4.85) | 2.57 (1.49-4.46) | 5.76 (5.12-6.47) | 6.21 (4.60-8.38) |
| History of diabetes | 4.62 (4.04-5.29) | 1.31 (0.59-2.90) | 5.36 (4.47-6.43) | 3.15 (1.37-7.27) |
| Gestational diabetes | 2.97 (2.63-3.35) | 1.23 (0.80-1.91) | 2.29 (1.88-2.80) | 2.13 (1.58-2.87) |
Abbreviations: BMI, body mass index calculated as weight in kilograms divided by height in meters squared; OR, odds ratio.
a
Results for China are from weighted logistic regression.
b
Reference group: normal BMI.