Table 4.
Adjusted odds ratios (OR) and 95% confidence intervals (CI) according to selected factors, Bangkok, Thailand, 2006–2007.
| Covariates | All Preeclampsia (n = 150) |
Early Onset Preeclampsia (n = 29) |
Late Onset Preeclampsia (n = 121) |
|---|---|---|---|
| Adjusted OR* (95% CI) | Adjusted OR* (95% CI) | Adjusted OR* (95% CI) | |
| Maternal age (years) | |||
| <20 | 1.99 (0.70, 5.68) | 1.80 (0.27, 12.01) | 1.94 (0.64, 5.86) |
| 20–24 | 1.11 (0.57, 2.18) | 0.67 (0.17, 2.70) | 1.13 (0.56, 2.27) |
| 25–29 | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| 30–34 | 2.30 (1.03, 5.17) | 1.55 (0.38, 6.33) | 2.23 (0.97, 5.13) |
| ≥35 | 2.04 (0.89, 4.67) | 1.87 (0.45, 7.74) | 1.99 (0.85, 4.68) |
| Trend test p-value | 0.229 | 0.314 | 0.249 |
| Alcohol use in pregnancy | 0.10 (0.01, 1.06) | - | - |
| Smoked in pregnancy | 0.14 (0.01, 2.21) | - | - |
| Exercise during pregnancy | - | 0.55 (0.11, 2.76) | - |
| Family history of hypertension | 1.92 (0.87, 4.23) | - | 1.83 (0.83, 4.03) |
| History of hypertensive disorders during pregnancy | |||
| Nulliparous | 1.31 (0.71, 2.39) | 0.98 (0.34, 2.80) | 1.45 (0.78, 2.70) |
| Parous-no prior history | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| Parous-prior history | 7.83 (0.88, 69.44) | 24.30 (2.05, 287.87) | 4.77 (0.50, 45.34) |
| Pre-pregnancy BMI (kg/m2) | |||
| <18.5 | 0.31 (0.13, 0.73) | 0.38 (0.07, 2.24) | 0.29 (0.12, 0.73) |
| 18.5–24.9 | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| 25–29.9 | 1.71 (0.81, 3.58) | 2.70 (0.82, 8.91) | 1.64 (0.75, 3.57) |
| ≥30.0 | 5.25 (1.80, 15.32) | 4.07 (0.81, 20.42) | 5.33 (1.83, 15.51) |
| Trend test p-value | <0.001 | 0.009 | <0.001 |
| Prenatal care onset/utilization | |||
| Care initiated in 1st trimester | 1.00 (Reference) | - | 1.00 (Reference) |
| Care initiated after 1st trimester | 0.99 (0.57, 1.70) | - | 1.04 (0.59, 1.84) |
| No prenatal care | 6.37 (1.26, 32.27) | - | 7.19 (1.36, 38.11) |
*
Each column represents a different logistic regression model. Covariates not included in final models are indicated as (-). Each OR and 95% CI is adjusted for all other covariates listed in this table.