Table 1.
Characteristics of the women, pregnancy and birth
| n (%) | |||
|---|---|---|---|
| 2004‐20063 (n = 327) | 2011‐2012 (n = 176) | General pregnant Dutch population | |
| Age (y) | |||
| < 20 | 0 (0) | 2 (1) | 2257 (1.3)8 |
| 20‐34 | 208 (63) | 114 (65) | 135 406 (78.2)8 |
| 35‐39 | 94 (29) | 44 (25) | 29 562 (17.1)8 |
| ≥ 40 | 25 (8) | 16 (9) | 5860 (3.4)8 |
| BMI (kg/m2) | |||
| < 18.5 | 15 (5) | 6 (3) | N/A (N/A) |
| 18.5‐24.9 | 137 (42) | 84 (48) | N/A (N/A) |
| 25.0‐29.9 | 39 (12) | 30 (17) | N/A (N/A) |
| ≥ 30 | 24 (7) | 10 (6) | N/A (N/A) |
| Missing | 112 (34) | 46 (26) | N/A (N/A) |
| Ethnicity | |||
| Caucasian | N/A (N/A) | 109 (62) | N/A (N/A) |
| Non‐Caucasian | N/A (N/A) | 51 (29) | N/A (N/A) |
| Missing | N/A (N/A) | 16 (9) | N/A (N/A) |
| Parity | |||
| 0 | 158 (48.3) | 82 (47) | 77 647 (44.9)8 |
| 1‐2 | 145 (44.3) | 83 (47) | 93 454 (49.1)8 |
| ≥ 3 | 24 (7.3) | 11 (6) | 1998 (6.0)8 |
| Previous CS | 66 (20) | 45 (26) | 1068 (10.9)10 |
| Previous PPHa | 40 (12) | 15 (9) | N/A (N/A) |
| Gestational age (wk) | |||
| 20‐24 | 6 (2) | 1 (1) | N/A (N/A) |
| 24‐32 | 18 (5) | 10 (6) | N/A (N/A) |
| 32‐37 | 62 (19) | 24 (13) | N/A (N/A) |
| ≥ 37 | 241 (74) | 141 (80) | N/A (N/A) |
| Mode of birth | |||
| Vaginal | 131 (40) | 64 (36) | 131 265 (74.5)8 |
| Instrumental | 43 (13) | 37 (21) | 16 210 (9.2)8 |
| Cesarean section | 151 (46) | 75 (43) | 28 680 (16.3)8 |
| Elective | 46 (14) | 36 (21) | 12 280 (7.1)8 |
| Emergency | 105 (32) | 39 (22) | 16 400 (9.2)8 |
| Induction of labor | 100 (31) | 61 (35) | 37 510 (21.7)8 |
| Multiple pregnancy | 37 (11) | 11 (6) | 2992 (1.7)8 |
| Pre‐eclampsia | 54 (17) | 23 (13) | 31 560 (2.2)11 |
BMI, body mass index; CS, cesarean section; N/A, not available; PPH, postpartum hemorrhage.
a
Data about previous experienced PPH were missing for 82 women (47%).