Differences between sudden infant death syndrome and explained sudden unexpected death in infancy
| SIDSn (%) | Explained SUDIn (%) | Univariate logisticregressionOR (95% CI) | Multivariate logisticregression*OR (95% CI) | |
|---|---|---|---|---|
| SIDS, sudden infant death syndrome; SUDI, sudden unexpected death in infancy. | ||||
| *Adjusted for sleep position, breast feeding, maternal smoking in pregnancy, family status, socioeconomic status, maternal age at delivery, ethnicity, cosleeping, previous live birth, birth weight and extra heating of the infant. | ||||
| Maternal variable Maternal age (years) | ||||
| <25 | 158 (47.5) | 14 (35.0) | 1.68 (0.85 to 3.32) | 1.41 (0.55 to 3.60) |
| ⩾25 | 175 (52.6) | 26 (65.0) | 1.00 | 1.00 |
| Living with partner | ||||
| No | 68 (20.4) | 6 (15.0) | 1.45 (0.59 to 3.61) | 1.85 (0.58 to 5.87) |
| Yes | 265 (79.6) | 34 (85.0) | 1.00 | 1.00 |
| Socioeconomic status | ||||
| Low | 164 (49.6) | 17 (42.5) | 1.61 (0.59 to 4.36) | 0.52 (0.12 to 2.22) |
| Middle | 131 (39.6) | 17 (42.5) | 1.28 (0.47 to 3.49) | 0.67 (0.21 to 2.20) |
| High | 36 (10.9) | 6 (15.0) | 1.00 | 1.00 |
| Number of previous live births | ||||
| 0 | 111 (33.3) | 10 (25.0) | 1.00 | 1.00 |
| ≥1 | 222 (66.7) | 30 (75.0) | 0.67 (0.31 to 1.41) | 0.85 (0.36 to 2.00) |
| Maternal smoking in pregnancy | ||||
| No | 120 (36.0) | 16 (40.0) | 1.00 | 1.00 |
| Yes | 213 (64.0) | 24 (60.0) | 1.18 (0.60 to 2.31) | 1.21 (0.52 to 2.85) |
| Infant variables | ||||
| Birth weight (g) | ||||
| <2500 | 59 (17.8) | 4 (10.0) | 1.95 (0.67 to 5.69) | 1.39 (0.44 to 4.39) |
| ⩾2500 | 272 (82.2) | 36 (90.0) | 1.00 | 1.00 |
| Ethnicity | ||||
| Both parents European | 270 (82.3) | 34 (85.0) | 1.00 | 1.00 |
| One or both parents not European | 58 (17.7) | 6 (15.0) | 1.22 (0.49 to 3.04) | 1.22 (0.45 to 3.33) |
| Sleep position | ||||
| Prone | 136 (42.0) | 7 (19.4) | 3.44 (1.37 to 8.61) | 4.29 (1.45 to 12.77) |
| Side | 97 (29.9) | 16 (44.4) | 1.07 (0.51 to 2.25) | 1.05 (0.46 to 2.36) |
| Supine | 91 (28.1) | 13 (36.1) | 1.00 | 1.00 |
| Cosleeping with an adult | ||||
| Yes | 48 (14.4) | 9 (22.5) | 0.58 (0.26 to 1.29) | 0.73 (0.30 to 1.79) |
| No | 285 (85.6) | 31 (77.5) | 1.00 | 1.00 |
| Pillow | ||||
| Yes | 118 (35.9) | 17 (43.6) | 0.72 (0.37 to 1.42) | 0.49 (0.23 to 1.05) |
| No | 211 (64.1) | 22 (56.4) | 1.00 | 1.00 |
| Breast feeding for the first 2 weeks of life | ||||
| Yes | 165 (49.6) | 29 (72.5) | 1.00 | 1.00 |
| No | 168 (50.5) | 11 (27.5) | 2.68 (1.30 to 5.55) | 2.20 (0.94 to 5.16) |
| Pacifier used in the last sleep | ||||
| Yes | 135 (41.0) | 16 (40.0) | 1.04 (0.53 to 2.04) | 1.26 (0.57 to 2.77) |
| No | 194 (59.0) | 24 (60.0) | 1.00 | 1.00 |
| Extra heating during last sleep | ||||
| Yes | 53 (16.1) | 6 (15.8) | 1.02 (0.41 to 2.57) | 0.93 (0.35 to 2.47) |
| No | 276 (83.9) | 32 (84.2) | 1.00 | 1.00 |