Table 5.
Multivariate model controlling for adverse bed sharing conditions. Figures are numbers (percentage) of infants unless stated otherwise
| Details for infant* | Infants who died (n=312) | Controls (n=1295) | Multivariate odds ratio (95% CI) | P value |
|---|---|---|---|---|
| Solitary sleeper | 111 (35.6) | 419 (32.4) | 1.96 (1.31 to 2.93) | 0.001 |
| Bed sharer (put back in cot) | 24 (7.7) | 178 (13.7) | 0.60 (0.33 to 1.08) | 0.09 |
| Bed sharer (at end of sleep) | 79 (25.3) | 186 (14.4) | 1.35 (0.83 to 2.20) | 0.23 |
| Sofa sharer | 20 (6.4) | 6 (0.5) | 25.86 (6.72 to 99.47) | <0.0001 |
| Parental tiredness† | 86 (27.6) | 191 (14.7) | 2.42 (1.61 to 3.63) | <0.0001 |
| Maternal alcohol consumption‡ | 37 (11.9) | 41 (3.2) | 3.40 (1.88 to 6.16) | <0.0001 |
| Overcrowding§ | 13 (4.2) | 4 (0.3) | 18.49 (3.62 to 94.48) | 0.0005 |
| Duvet tog: | ||||
| 1-4 | 37 (11.9) | 139 (10.7) | 1.47 (0.90 to 2.39) | 0.12 |
| 5-8 | 59 (18.9) | 91 (7.0) | 3.97 (2.43 to 6.46) | <0.0001 |
| ⩾9 | 26 (8.3) | 32 (2.5) | 3.26 (1.54 to 6.90) | 0.002 |
*
Reference group for sleeping environment (first four variables) was infants who shared room, reference group for duvet thickness (last three variables) was infants who did not use duvet.
†
Defined as longest period of infant sleep in previous 24 hours before last sleep: >4 v ⩽4 hours).
‡
>2 units of alcohol in 24 hours before last or reference sleep.
§
Defined as >2 people per room (excluding kitchen not used for dining, toilet, bathroom, and hallways).