Table 1 Basic characteristics of the study population
From: Prior cesarean section is associated with increased preeclampsia risk in a subsequent pregnancy
Preeclampsia in the second pregnancy | |||
|---|---|---|---|
No (n = 126,250) | Yes (n = 1,473) | Pvalue | |
Preeclampsia in the first pregnancy (%) | 2679 (2.12) | 411 (27.90) | <.01 |
Age in the second pregnancy (years) | 30.6 ± 3.4 | 31.34 ± 3.7 | <.01 |
Old age (≥35 years) in the second pregnancy (%) | 14 670 (11.62) | 281 (19.08) | <.01 |
Multiple pregnancies in the first pregnancy (%) | 464 (0.37) | 8 (0.54) | .27 |
Multiple pregnancies in the second pregnancy (%) | 871 (0.69) | 40 (2.72) | <.01 |
Prior cesarean section (%) | 38 419 (30.43) | 623 (42.29) | <.01 |
Interval between the 2 pregnancies (years) | 2.50 ± 0.92 | 2.65 ± 1.00 | <.01 |