Table 2.
Group Characteristics According to Mean Blood Pressure during Pregnancy.
| SBP during pregnancy | DBP during pregnancy | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Q1 (N = 130) | Q2 (N = 130) | Q3 (N = 130) | Q4 (N = 130) | P-value | Q1 (N = 130) | Q2 (N = 130) | Q3 (N = 130) | Q4 (N = 130) | p-value | |
| Follow-up period (years) | 25.7 ± 10.1a,b | 28.6 ± 10.4 | 29.4 ± 10.2a | 30.3 ± 9.8b | 0.002* | 27.8 ± 9.8 | 28.0 ± 10.4 | 29.3 ± 10.0 | 28.8 ± 10.6 | 0.595* |
| Age (years) | 52.5 ± 8.3a | 54.8 ± 9.1 | 55.2 ± 7.3 | 55.3 ± 7.3a | 0.022* | 53.5 ± 8.1 | 54.3 ± 8.7 | 55.2 ± 8.5 | 54.9 ± 8.1 | 0.350* |
| Age at delivery (years) | 26.8 ± 4.3 | 26.2 ± 4.0 | 25.9 ± 4.2a | 25.0 ± 4.4a | 0.005* | 25.7 ± 4.0 | 26.3 ± 4.0 | 25.9 ± 4.4 | 26.1 ± 4.6 | 0.432* |
| Current BMI (kg/m2) | 21.9 ± 3.6 | 22.7 ± 3.3 | 22.5 ± 2.7 | 23.0 ± 3.4 | 0.079* | 22.2 ± 3.1 | 22.3 ± 3.6 | 22.6 ± 2.9 | 23.0 ± 3.6 | 0.242* |
| Current smoking | 8 (6.8%) | 10 (8.0%) | 6 (5.2%) | 13 (10.7%) | 0.370** | 9 (7.6%) | 8 (6.8%) | 6 (5.0%) | 14 (11.5%) | 0.483** |
| Hypertension† (%) | 22 (15.9%) | 34 (24.6%) | 41 (29.7%) | 41 (29.7%) | 0.0189** | 26 (18.8%) | 34 (24.6%) | 31 (22.5%) | 47 (34.1%) | 0.0255** |
Abbreviations: systolic blood pressure (SBP); diastolic blood pressure (DBP); body mass index (BMI)
†Antihypertensive medication usage or blood pressures ≥140/90 mmHg.
*: One-way analysis of variance
**: χ2 test
a, b: p < 0.05 vs the first quartile (Q1) using Tukey’s test.