Age, birth weight, and weaning of SIDS cases and controls exposed to prenatal maternal smoking compared with non-exposed cases and controls in Scandinavia 1992 to 1995, the Nordic epidemiological SIDS study
| Characteristics | SIDS cases | SIDS controls | |||||
|---|---|---|---|---|---|---|---|
| Non-exposed | Exposed | p | Non-exposed | Exposed | p | ||
| Age (weeks; 95% CI) | 16.1 (13.8 to 18.4) | 15.9 (14.2 to 17.6) | 0.90 | 21.2 (20.2 to 22.3) | 21.9 (20.3 to 23.5) | 0.50 | |
| Birth weight (g; 95% CI) | 3340 (3161 to 3517) | 3065 (2950 to 3178) | 0.007 | 3653 (3610 to 3696) | 3462 (3399 to 3525) | <0.001 | |
| Weaning (weeks; 95% CI) | 11.9 (8.1 to 15.6) | 8.0 (6.4 to 9.7) | 0.036 | 15.4 (13.7 to 17.1) | 11.7 (9.8 to 13.6) | 0.004 | |
CI = confidence interval.