The Effect of Sleeping Position Placed to Sleep the Last Time in SIDS, Stratified by Each Matching Variable, Country, Year of Birth, and Gender, and by Infant's Age
| Matching Variable | SIDS (%) | Controls (%) | Sleeping Position | ||||
|---|---|---|---|---|---|---|---|
| Prone | Side | Supine | |||||
| OR | 95% CI | OR | 95% CI | Reference | |||
| Country | |||||||
| Denmark | 55 (22.5) | 170 (19.6) | 37.3 | 8.4 –165 | 3.3 | 1.1 –11 | 1 |
| Norway | 72 (29.5) | 269 (31.0) | 15.1 | 5.9 –38 | 2.2 | 1.0 –4.7 | 1 |
| Sweden | 117 (48.0) | 430 (49.5) | 14.4 | 6.4 –33 | 7.1 | 3.0 –17 | 1 |
| Year of birth | |||||||
| 1991–92 | 107 (43.9) | 360 (41.4) | 11.8 | 5.2 –27 | 2.7 | 1.2 –6.1 | 1 |
| 1993 | 79 (32.4) | 272 (31.3) | 12.0 | 4.5 –32 | 4.0 | 1.6 –10 | 1 |
| 1994–95 | 58 (23.8) | 237 (27.3) | 14.6 | 5.4 –40 | 3.7 | 1.5 –9.2 | 1 |
| Gender | |||||||
| Boys | 159 (65.2) | 562 (64.7) | 10.3 | 5.5 –19 | 3.4 | 1.8 –6.5 | 1 |
| Girls | 85 (34.8) | 306 (35.3) | 30.4 | 11 –88 | 4.3 | 1.8 –10 | 1 |
| Infant's age (wk) | |||||||
| 1–12 | 120 (49.6) | 233 (27.2) | 6.7 | 2.5 –18 | 2.3 | 0.85 –6.1 | 1 |
| 13–24 | 77 (31.8) | 353 (41.1) | 28.5 | 7.9 –107 | 5.9 | 1.6 –22 | 1 |
| 25+ | 45 (18.6) | 272 (31.7) | 4.7 | 1.7 –13 | 1.7 | 0.71 –4.2 | 1 |