Description of well known risk factors for SIDS
| Cases | Controls | |
|---|---|---|
| Male sex | 48 (66%) | 84 (58%) |
| Twins | 6 (8%) | 2 (1%) |
| Single mother | 4 (5%) | 2 (1%) |
| Multiparity | 52 (70%) | 69 (47%) |
| Signs of illness in reference sleep | ||
| Less alert | 18 (24%) | 4 (3%) |
| Cold | 33 (45%) | 66 (45%) |
| Fever | 6 (8%) | 4 (3%) |
| Profuse sweating | 4 (6%) | 5 (3%) |
| Bronchitis/pneumonia | ||
| Before final week | 9 (12%) | 24 (16%) |
| In final week | 2 (3%) | 5 (3%) |
| Smoking behaviour mother | ||
| Before pregnancy | ||
| Non-smoker | 40 (54%) | 109 (74%) |
| Fewer than 10 | 7 (10%) | 11 (7%) |
| 10 or more | 27 (36%) | 28 (19%) |
| During pregnancy | ||
| Non-smoker | 44 (60%) | 121 (82%) |
| Fewer than 10 | 12 (16%) | 19 (13%) |
| 10 or more | 18 (24%) | 8 (5%) |
| After birth | ||
| Non-smoker | 44 (60%) | 119 (80%) |
| Fewer than 10 | 4 (5%) | 13 (9%) |
| 10 or more | 26 (35%) | 16 (11%) |
| Smoking behaviour father and others | ||
| Before pregnancy | ||
| Non-smoker | 32 (43%) | 105 (71%) |
| Fewer than 10 | 11 (15%) | 11 (8%) |
| 10 or more | 31 (42%) | 31 (21%) |
| During pregnancy | ||
| Non-smoker | 32 (43%) | 108 (74%) |
| Fewer than 10 | 11 (15%) | 12 (8%) |
| 10 or more | 31 (42%) | 27 (18%) |
| After birth | ||
| Non-smoker | 34 (46%) | 112 (76%) |
| Fewer than 10 | 8 (11%) | 11 (8%) |
| 10 or more | 32 (43%) | 24 (16%) |
| Breast feeding only | ||
| More than 6 weeks | 28 (39%) | 82 (55%) |
| More than 13 weeks | 7 (10%) | 41 (28%) |
| Maternal psychological problems | 7 (10%) | 3 (2%) |
| Change in routine | 32 (43%) | 44 (30%) |
| Bed sharing | 6 (8%) | 7 (5%) |
| Together with excessive smoking | 4 (5%) | 1 (1%) |
| Mean (SD) maternal age (years) | 25.65 (4.73) | 28.24 (4.36) |
| Mean (SD) birth weight (g) | 3060 (800) | 3500 (680) |
| Mean (SD) gestational age (weeks) | 38.27 (3.40) | 39.64 (1.47) |
| Socioeconomic status | −0.37 (1.41) | 0.18 (1.39) |
| Alcohol use since birth of child1-150 | ||
| Mother | 0.28 (0.61) | 0.34 (0.67) |
| Father | 1.53 (2.47) | 1.09 (1.31) |
| Alcohol use before reference sleep1-150 | ||
| Mother | 0.33 (0.90) | 0.26 (0.65) |
| Father | 1.64 (3.29) | 0.97 (1.48) |
↵1-150 Mean (SD) number of alcoholic drinks each day.