Table 2.
Odds ratios (OR) and 95% confidence intervals (CI) for reproductive and medical history characteristics of preeclampsia cases and normotensive controls, Bangkok, Thailand, 2006–2007.
| Covariates | Controls (n = 150) |
Preeclampsia (n = 150) |
Unadjusted OR (95% CI) | Early Onset Preeclampsia (n = 29) |
Late Onset Preeclampsia (n = 121) |
||||
|---|---|---|---|---|---|---|---|---|---|
| n | % | n | % | n | OR (95% CI) | n | OR (95% CI) | ||
| Parity | |||||||||
| Nulliparous | 90 | 60.0 | 82 | 54.7 | 0.80 (0.51, 1.27) | 14 | 0.62 (0.28, 1.38) | 68 | 0.86 (0.53, 1.39) |
| Multiparous | 60 | 40.0 | 68 | 45.3 | 1.00 (Reference) | 15 | 1.00 (Reference) | 53 | 1.00 (Reference) |
| History of hypertensive disorders during pregnancy | |||||||||
| Nulliparous | 90 | 60.0 | 82 | 54.7 | 0.93 (0.58, 1.48) | 14 | 0.83 (0.35, 1.96) | 68 | 0.95 (0.58, 1.56) |
| Parous-no prior history | 59 | 39.3 | 58 | 38.7 | 1.00 (Reference) | 11 | 1.00 (Reference) | 47 | 1.00 (Reference) |
| Parous-prior history | 1 | 0.7 | 10 | 6.7 | 10.17 (1.26, 82.02) | 4 | 21.45 (2.19, 210.57) | 6 | 7.53 (0.88, 64.75) |
| Number of previous abortion | |||||||||
| 0 | 113 | 75.3 | 115 | 76.7 | 1.00 (Reference) | 21 | 1.00 (Reference) | 94 | 1.00 (Reference) |
| 1 | 32 | 21.3 | 31 | 20.7 | 0.95 (0.54, 1.66) | 7 | 1.18 (0.46, 3.02) | 24 | 0.90 (0.50, 1.64) |
| ≥2 | 5 | 3.3 | 4 | 2.7 | 0.79 (0.21, 3.00) | 1 | 1.08 (0.12, 9.68) | 3 | 0.72 (0.17, 3.10) |
| Family history of hypertension | |||||||||
| No | 135 | 90.0 | 123 | 82.0 | 1.00 (Reference) | 24 | 1.00 (Reference) | 99 | 1.00 (Reference) |
| Yes | 14 | 9.3 | 27 | 18.0 | 2.12 (1.06, 4.22) | 5 | 2.01 (0.66, 6.09) | 22 | 2.14 (1.04, 4.40) |
| Missing | 1 | 0.7 | 0 | 0.0 | 0 | 0 | |||