Table 3.
Odds ratios (OR) and 95% confidence intervals (CI) for current pregnancy 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) | ||
| Pre-pregnancy BMI (kg/m2) | |||||||||
| <18.5 | 31 | 20.7 | 11 | 7.3 | 0.38 (0.18, 0.81) | 2 | 0.38 (0.08, 1.72) | 9 | 0.39 (0.17, 0.86) |
| 18.5–24.9 | 93 | 62.0 | 86 | 57.3 | 1.00 (Reference) | 16 | 1.00 (Reference) | 70 | 1.00 (Reference) |
| 25–29.9 | 16 | 10.7 | 25 | 16.7 | 1.69 (0.85, 3.38) | 7 | 2.54 (0.90, 7.16) | 18 | 1.49 (0.71, 3.14) |
| ≥30.0 | 5 | 3.3 | 22 | 14.7 | 4.76 (1.73, 13.12) | 3 | 3.49 (0.76, 16.05) | 19 | 5.05 (1.80, 14.18) |
| Missing | 5 | 3.3 | 6 | 4.0 | 1 | 5 | |||
| Maternal height (m) | |||||||||
| Low stature (≤145 cm) | 3 | 2.0 | 2 | 1.3 | 0.65 (0.11, 3.97) | 0 | - | 2 | 0.81 (0.13, 4.94) |
| Normal (>145 cm) | 145 | 96.7 | 148 | 98.7 | 1.00 (Reference) | 29 | 1.00 (Reference) | 119 | 1.00 (Reference) |
| Missing | 2 | 1.3 | 0 | 0.0 | 0 | 0 | |||
| Prenatal care onset | |||||||||
| Care initiated in 1st trimester | 67 | 44.7 | 63 | 42.0 | 1.00 (Reference) | 15 | 1.00 (Reference) | 48 | 1.00 (Reference) |
| Care initiated after 1st trimester | 79 | 52.7 | 77 | 51.3 | 1.04 (0.65, 1.65) | 13 | 0.74 (0.33, 1.65) | 64 | 1.13 (0.69, 1.86) |
| No prenatal care | 4 | 2.7 | 10 | 6.7 | 2.66 (0.79, 8.91) | 1 | 1.12 (0.12, 10.72) | 9 | 3.14 (0.91, 10.80) |
| Infant gender | |||||||||
| Female | 68 | 45.3 | 76 | 50.7 | 1.00 (Reference) | 17 | 1.00 (Reference) | 59 | 1.00 (Reference) |
| Male | 82 | 54.7 | 74 | 49.3 | 0.81 (0.51, 1.27) | 12 | 0.59 (0.26, 1.31) | 62 | 0.87 (0.54, 1.41) |