Characteristics of mothers and babies by random allocation
| Random allocation | ||
|---|---|---|
| Ultrasound(n = 282) | No ultrasound(n = 279) | |
| Values are number (%) unless otherwise stated. | ||
| *Values are mean (SD). | ||
| †Values are median (interquartile range). | ||
| ‡n = 271, 266; ¶n = 282, 279; §n = 282, 278. | ||
| Marital status | ||
| Married/cohabiting | 219 (77.7) | 223 (79.9) |
| Widowed/divorced/single | 25 (8.9) | 24 (8.6) |
| Not known | 38 (13.5) | 32 (11.5) |
| Profession of mother | ||
| Non-manual | 154 (54.6) | 157 (56.3) |
| Manual | 34 (12.1) | 38 (13.6) |
| Other | 53 (18.8) | 48 (17.2) |
| Not known | 41 (14.5) | 36 (12.9) |
| Maternal age (years)*‡ | 29.6 (5.6) | 29.0 (5.6) |
| Age of baby at trial entry (day)†¶ | 4.0 (1.0–18.3) | 6.0 (1.0–20.0) |
| Sex of baby, female | 199 (70.6) | 203 (72.8) |
| Birth weight (g)*§ | 3419 (495) | 3369 (552) |
| Gestational age at delivery (weeks)*¶ | 39.6 (1.5) | 39.5 (1.6) |
| Bilateral abnormality | 85 (30.1) | 95 (34.1) |
| Clinical diagnosis at trial entry dislocatable or worse | 162 (57.4) | 168 (60.2) |
| Clinical suspicion at trial entry sufficient to warrant early prophylactic splinting | 86 (30.5) | 80 (28.7) |