Table 2 Maternal characteristics for the fullPIERS Development cohort vs Extension cohort, (n (%) or median (interquartile range))
Characteristics | fullPIERS cohort (development) (2023 women) | Extension cohort (541 women) | P value |
|---|---|---|---|
DEMOGRAPHICS & PREGNANCY CHARACTERISTICS | |||
 Maternal age at EDD (year) | 31 [27, 36] | 30 [24, 34] | < 0.001 |
 Parity ≥ 1 | 581 (28·7%) | 219 (40.4%) | < 0.001 |
 Gestational age at eligibility (week) | 36 [33, 38·3] | 33.0 [29.7, 35.9] | < 0.001 |
 Gestational age at eligibility < 34 weeks, N | 636 (31.4%) | 307 (56.7%) | < 0.001 |
 Multiple pregnancy | 192 (9·5%) | 43 (8.0%) | 0.2468 |
 Smoking in this pregnancy | 249 (12·3%) | 118 (21.8%) | < 0.001 |
INTERVENTIONS DURING ADMISSION | |||
 Corticosteroids, GA onset < 34 | 440/636 (69.2%) | 128/307 (41.7%) | < 0.001 |
 Antihypertensive therapy | 1381 (68·3%) | 384 (71.0%) | 0.054 |
 MgSO4 | 690 (34·1%) | 410 (75.8%) | < 0.001 |
PREGNANCY OUTCOMES | |||
 Admission-To-Delivery Interval, < 34+ 0 Weeks (Days), mean (SD) | 10.9 (11) | 5.0 (8) | < 0.001 |
 Gestational age at delivery (week), median (IQR) | 36.9 [34·1, 38·6] | 33.9 [30.5, 36.4] | < 0.001 |
 Stillbirth | 20 (1.0%) | 10 (1.9%) | 0.2489 |
 Neonatal death | 26 (1·3%) | 12 (2.2%) | 0.0989 |
ADVERSE MATERNAL OUTCOME (N women) | |||
 Within 48 h | 106 (5.2%) | 44 (8.1%) | 0.023 |
 Within 7 days | 203 (10.0%) | 52 (9.6%) | 0.067 |
 At anytime | 261 (12.9%) | 57 (10.5%) | 0.243 |