Table 1. Characteristics of 211 women with essential chronic hypertension.
| Maternal age (y, mean ± SD) | 35.7±4.8 |
| Pre-pregnancy BMI (Kg/m2, mean ± SD)(n = 202) | 27.9±6.5 |
| Ethnic origin Black # (%) | 113 (53.6) |
| Ethnic origin White # (%) | 94 (45.5) |
| Ethnic origin Other # (%) | 4 (1.9) |
| Nulliparous # (%) | 39 (18.5) |
| Previous preeclampsia # (%) | 45/172 (26.1) |
| Previous FGR # (%) | 38/172 (22.1) |
| Previous abruptio placenta # (%) | 9/172 (5.2) |
| Booking gestational age (wk, mean ± SD) | 18.1±5.6 |
| Tobacco use # (%) | 20 (9.5) |
| Booking systolic blood pressure(mmHg, mean ± SD) | 131.3±14.8 |
| Booking diastolic blood pressure(mmHg, mean ± SD) | 78.2±11.8 |
| Booking MAP (mmHg, mean ± SD) | 95.9±11.7 |
| Duration of hypertension (y, mean ± SD) | 4.6±3.5 |
| Antihypertensive medication at booking | |
| One drug only # (%) | 152 (73.4) |
| Two drugs # (%) | 45 (21.7) |
| More than two drugs # (%) | 10 (4.8) |
| Antihypertensives withdrawn duringpregnancy # (%) | 17 (8.1) |
| Aspirin use # (%) | 49 (23.2) |
| Gestational diabetes # (%) | 41 (19.4) |
FGR: fetal growth restriction; MAP: mean arterial blood pressure.