Table 1.
Characteristics of women by matched groups. Figures are percentages (numbers) of women
| IMA (n=1462) | NHS (n=7214) | |
|---|---|---|
| Age (years): | ||
| <20 | 0.5 (7) | 0.5 (36) |
| 20-29 | 17.6 (257) | 17.6 (1270) |
| 30-39 | 73.8 (1079 | 73.8 (5324) |
| ≥40 | 8.1 (118) | 8.1 (584) |
| Fifth of deprivation: | ||
| 1 (least deprived) | 33.8 (494) | 33.8 (2438) |
| 2 | 25.1 (367) | 25.1 (1811) |
| 3 | 17.9 (262) | 17.9 (1291) |
| 4 | 14.4 (211) | 14.4 (1039) |
| 5 (most deprived) | 8.7 (127) | 8.7 (628) |
| Existing medical condition | 1.5 (22) | 1.0 (72) |
| Previous obstetric complications | 21.0 (307) | 17.8 (1284) |
| Year of birth: | ||
| 2002 | 24.9 (364) | 24.9 (1796) |
| 2003 | 25.8 (377) | 25.8 (1861) |
| 2004 | 23.5 (344) | 23.5 (1695) |
| 2005 | 25.8 (377) | 25.8 (1861) |
| Parity: | ||
| 0 | 38.3 (560) | 38.3 (2763) |
| 1 | 38.9 (569) | 38.9 (2806) |
| 2 | 16.6 (243) | 16.6 (1198) |
| 3 | 4.4 (64) | 4.4 (317) |
| ≥4 | 1.8 (26) | 1.8 (130) |
| Multiple pregnancy | 3.4 (50) | 3.1 (224) |
| Breech presentation | 4.4 (64) | 5.3 (382) |
IMA=Independent Midwives’ Association.