| Group | PM status | n (%) | Gestational age (weeks)a Mean (SD) | p valueb |
---|---|---|---|---|---|
Enrollment | Primigravid | PM− | 104 | 21.4 (7.1) | 0.8 |
PM+ | 67 (39.2%) | 22.1 (4.7) | Â | ||
Secundigravid | PM− | 92 | 20.3 (6.7) | 0.2 | |
PM+ | 34 (27.0%) | 22.1 (5.5) | Â | ||
Multigravid | PM− | 302 | 21.1 (6.3) | 0.7 | |
PM+ | 58 (16.1%) | 21.6 (6.6) | Â | ||
Gestational week 30–32 | Primigravid | PM− | 122 |  |  |
PM+ | 14 (10.3%) | Â | Â | ||
Secundigravid | PM− | 90 |  |  | |
PM+ | 4 (4.3%) | Â | Â | ||
Multigravid | PM− | 270 |  |  | |
PM+ | 15 (5.3%) | Â | Â | ||
Delivery | Primigravid | PM− | 144 | 37.6 (4.2) | 0.03 |
PM+ | 27 (15.8%) | 36.6 (4.1) | Â | ||
Secundigravid | PM− | 109 | 37.7 (5.0) | 0.8 | |
PM+ | 16 (12.8%) | 38.6 (1.3) | Â | ||
Multigravid | PM− | 326 | 38.6 (4.0) | 0.2 | |
PM+ | 34 (9.4%) | 39.6 (1.3) | Â | ||
Pregnancy outcomec | Primigravid | Pregnancy loss | 18 (61.1% BS +) |  |  |
PTD | 26 (65.4% BS +) |  |  | ||
LBW | 33 (66.6% BS +) |  |  | ||
SGA | 18 (44.4% BS +) |  |  | ||
Secundigravid | Pregnancy loss | 9 (33.3% BS +) |  |  | |
PTD | 14 (42.9% BS +) |  |  | ||
LBW | 19 (52.6% BS +) |  |  | ||
SGA | 11 (63.6% BS +) |  |  | ||
Multigravid | Pregnancy loss | 17 (23.5% BS +) |  |  | |
PTD | 8 (37.5% BS +) |  |  | ||
LBW | 20 (20.0% BS +) |  |  | ||
SGA | 22 (28.6% BS +) |  |  |