Risk and preventive factors for SIDS in an “immutable”, a “mutable”, and a “combined” model, including the odds ratios (with 95% CI) adjusted for the confounders2-150
| Immutable | Mutable | Combined | |
|---|---|---|---|
| Maternal age | 1.18 (1.01 to 1.39) | – | 1.32 (1.09 to 1.60) |
| Twinship2-151 | 123.46 (3.39 to 4533.75) | – | 1428.57 (23.14 to 79990) |
| Birth weight (per 500 g less) | 2.59 (1.30 to 5.14) | – | 2.13 (0.88 to 5.10) |
| Socioeconomic status | 1.79 (1.01 to 3.18) | – | 2.00 (1.01 to 4.00) |
| Postnatal passive smoking (per cigarette) | |||
| Non-smoker | – | 1 | 1 |
| Fewer than 10 | – | 2.82 (0.35 to 22.68) | 5.94 (0.46 to 77.08) |
| 10 or more | – | 5.97 (1.46 to 24.38) | 2.88 (0.50 to 16.56) |
| Alcohol consumption by mother 24 hours before death | – | 2.25 (1.01 to 6.34) | 8.09 (2.25 to 29.11) |
| Breast feeding only (more than 13 weeks) | – | 0.07 (0.01 to 0.62) | 0.09 (0.01 to 0.88) |
| Change in routine | – | 3.68 (1.05 to 14.14) | 4.85 (0.90 to 25.00) |
| Percentage of correctly predicted classifications2-152 | 90.81% | 92.27% | 93.37% |
In each model all odds ratio’s are adjusted for the confounders and the other variables.
↵2-150 Infant’s age, sleeping position, duvet use, use of sleeping sack, dummy use.
↵2-151 Owing to the small number of twins, the confidence interval becomes exceptionally wide.
↵2-152 For the model with only the confounders the percentage of correctly predicted classifications was 88.11%.