Table 2.
Baseline characteristics
| Characteristic at randomisation | Early ECV (n = 767)n (%) | Delayed ECV (n = 774)n (%) |
|---|---|---|
| Maternal age (years) (median 5th, 95th centile) | 30.0 (18.9, 39.2) | 30.0 (19.8, 39.2) |
| Parity | ||
| 0 | 409 (53.3) | 411 (53.1) |
| 1–4 | 346 (45.1) | 354 (45.7) |
| >4 | 12 (1.6) | 9 (1.2) |
| Gestational age (weeks) Median (5th, 95th centile) | 34.7 (33.1, 35.7) | 34.9 (33.3, 35.7) |
| 330–336 | 131 (17.1) | 109 (14.1) |
| 340–346 | 318 (41.5) | 323 (41.7) |
| 350–356 | 318 (41.5) | 342 (44.2) |
| Method of determining gestational age* | ||
| Clinical history only (no ultrasound) | 61 (8.0) | 49 (6.4) |
| First ultrasound ≤20 weeks (± clinical history) | 627 (81.9) | 656 (85.2) |
| First ultrasound >20 weeks (± clinical history) | 78 (10.2) | 65 (8.4) |
| Maternal height (cm) (median 5th, 95th centile)† | 163.0 (151.0, 176.0) | 163.0 (152.0, 176.0) |
| Maternal weight at last prenatal visit (kg)§ Median (5, 95th centile) | 74.0 (56.0, 104.5) | 72.0 (54.4, 100.0) |
| One previous caesarean section¶ | 36 (4.7) | 29 (3.8) |
| Time from last ultrasound to randomisation ≤7 (days)** | 757 (99.0) | 768 (99.6) |
| Placental location anterior‡ | 314 (41.0) | 319 (41.4) |
| Type of breech at last ultrasound§§ | ||
| Frank | 475 (62.1) | 467 (61.0) |
| Complete | 247 (32.3) | 253 (33.0) |
| Footling | 43 (5.6) | 46 (6.0) |
| National perinatal mortality rate¶¶ | ||
| ≤10/1000 | 656 (85.5) | 664 (85.8) |
| >10–20/1000 | 61 (8.0) | 62 (8.0) |
| >20/1000 | 50 (6.5) | 48 (6.2) |
Missing values in early, delayed group as follows: *1,4; †1,4; §13,9; ¶1,1; **1,3; ‡1,3; §§2, 8.
¶¶Countries with a national perinatal mortality rate of ≤10/1000 were Australia, Canada, Chile, Denmark, Estonia, Germany, Hungary, Ireland, Israel, The Netherlands, Poland, Portugal, Spain, UK, USA; countries with a national perinatal mortality rate of >10–20/1000 were Argentina, Brazil, Oman; countries with a national perinatal mortality rate of >20/1000 were Egypt, Jordan, South Africa; Reference for National Perinatal Mortality Rates: Neonatal and perinatal mortality: country, regional and global estimates. World Health Organization. Geneva 2006.