Table 2.
Maximal blood pressure categorisation according to American College of Cardiology and American Heart Association criteria, by gestational age
| Normal blood pressure at ≥20 weeks (n=13 346) | Elevated blood pressure at ≥20 weeks (n=2024) | Stage 1 hypertension at ≥20 weeks (n=3420) | Non-severe stage 2 hypertension at ≥20 weeks (n=1095) | Severe stage 2 hypertension at ≥20 weeks (n=154) | No blood pressure values at ≥20 weeks (n=1030) | |
|---|---|---|---|---|---|---|
| Normal blood pressure at <20 weeks (n=8194) | 5160 | 685* | 1035*† | 378 | 48 | 888 |
| Elevated blood pressure at <20 weeks (n=552) | 219* | 117* | 119*† | 49 | 0 | 48 |
| Stage 1 hypertension at <20 weeks (n=696) | 206*† | 87*† | 234*† | 83 | 11 | 75 |
| Non-severe stage 2 hypertension at <20 weeks (n=120) | 27 | 7 | 36 | 21 | 13 | 16 |
| Severe stage 2 hypertension at <20 weeks (n=12) | 2 | 1 | 1 | 3 | 2 | 3 |
| No blood pressure values at <20 weeks (n=11 495) | 7732 | 1127 | 1995 | 561 | 80 | 0 |
Data are n. Blood pressure was categorised as: normal blood pressure (sBP <120 mm Hg and dBP <80 mm Hg), elevated blood pressure (sBP 120–129 mm Hg and dBP <80 mm Hg), stage 1 hypertension (sBP 130–139 mm Hg or dBP 80–89 mm Hg, or both), non-severe stage 2 hypertension (sBP 140–159 mm Hg or dBP 90–109 mm Hg, or both), or severe stage 2 hypertension (sBP ≥160 mm Hg or dBP ≥110 mm Hg, or both). sBP=systolic blood pressure. dBP=diastolic blood pressure.
Indicates women who would additionally be diagnosed with hypertension if elevated blood pressure was used as the threshold for diagnosing hypertension in pregnancy.
Indicates women who would additionally be diagnosed with hypertension if stage 1 hypertension was used as the threshold for diagnosing hypertension in pregnancy.