Symptoms, illnesses, health problems, and hospitalisation, and risk of SIDS
| Variable (n = missing) | Case, n (%) | Control, n (%) | Univariate OR (95% CI) | Multivariate* OR (95% CI) |
|---|---|---|---|---|
| *Adjusting for maternal age (<20, 20–24, 25–29, 30+), family status (living alone/living with a partner), smoking in pregnancy (yes/no), parity (0/1 or more), socioeconomic status (low, middle, upper class), birth weight (in 500 g categories), breast feeding for >2 weeks (yes/no), sleep position, pacifier (yes/no), and infant sharing a bed with an adult (yes/no). | ||||
| In the last 7 days (parental interview) | ||||
| Runny nose (n = 4) | 115 (34.7) | 334 (33.5) | 1.07 (0.81 to 1.39) | |
| Cough (n = 4) | 60 (18.2) | 173 (17.4) | 1.07 (0.77 to 1.50) | |
| Diarrhoea (n = 8) | 28 (8.6) | 65 (6.5) | 1.37 (0.86 to 2.20) | |
| Vomiting (n = 4) | 53 (16.1) | 92 (9.2) | 1.90 (1.31 to 2.74) | 1.55 (0.78 to 3.03) |
| Measured temperature and fever >38°C (n = 0) | 25 (7.5) | 68 (6.8) | 1.11 (0.69 to 1.80) | |
| Attended doctor (n = 47) | 102 (32.2) | 323 (33.3) | 0.90 (0.69 to 1.19) | |
| In the last day | ||||
| Runny nose (n = 11) | 77 (23.4) | 238 (24.0) | 0.97 (0.72 to 1.3) | |
| Cough (n = 7) | 35 (10.6) | 126 (12.7) | 0.82 (0.55 to 1.23) | |
| Diarrhoea (n = 13) | 14 (4.3) | 18 (1.8) | 2.45 (1.19 to 5.05) | 1.47 (0.36 to 5.97) |
| Vomiting (n = 7) | 21 (6.4) | 33 (3.3) | 2.06 (1.15 to 3.70) | 1.28 (0.39 to 4.16) |
| Measured temperature and fever >38°C (n = 0) | 6 (1.8) | 14 (1.4) | 1.30 (0.49 to 3.44) | |
| Illnesses in the last 4 weeks (from paediatrician) | ||||
| Common childhood infectious illnesses (n = 96) | 4 (1.3) | 10 (1.1) | 1.03 (0.32 to 3.33) | |
| URTI or bronchitis (n = 99) | 65 (21.7) | 187 (20.1) | 1.09 (0.78 to 1.51) | |
| Any other infection (n = 97) | 49 (16.3) | 116 (12.4) | 1.40 (0.97 to 2.03) | |
| Any illness (n = 95) | 117 (39.0) | 353 (37.7) | 1.10 (0.84 to 1.44) | |
| Ever had the following (from paediatrician) | ||||
| Developmental problems (n = 96) | 65 (21.7) | 78 (8.3) | 3.35 (2.25 to 4.97) | 2.14 (1.04 to 4.39) |
| Accident (n = 95) | 9 (3.0) | 22 (2.4) | 1.11 (0.51 to 2.43) | |
| Neglect (n = 104) | 18 (6.1) | 7 (0.8) | 7.49 (3.12 to 17.93) | 0.79 (0.21 to 2.98) |
| Abuse suspected (n = 102) | 3 (1.0) | 1 (0.1) | – | |
| Special investigations (e.g. x ray, ECG) (n = 108) | 72 (24.6) | 180 (19.4) | 1.41 (1.02 to 1.95) | 2.07 (1.18 to 3.64) |
| Laboratory test (n = 114) | 63 (21.2) | 170 (18.5) | 0.83 (0.59 to 1.15) | |
| Referred to other specialist (n = 97) | 93 (31.1) | 274 (29.3) | 1.17 (0.87 to 1.57) | |
| Hospital admission and outpatient clinic (OPC) data | ||||
| Admitted to hospital at any stage of life (n = 36) | 113 (34.7) | 157 (16.2) | 2.88 (2.12 to 3.90) | 1.26 (0.52 to 3.03) |
| Admitted neonatal unit/hospital in first 7 days of life (n = 36) | 77 (23.6) | 96 (9.9) | 2.89 (2.05 to 4.08) | 1.77 (0.87 to 3.62) |
| Admitted to hospital, excluding admissions in first 7 days of life (n = 36) | 53 (16.3) | 75 (7.7) | 2.31 (1.57 to 3.,41) | 1.88 (1.16 to 3.03) |
| OPC or specialist clinic attendance (n = 0) | 28 (8.4) | 52 (5.2) | 1.72 (1.05 to 2.82) | |
| Admitted to hospital for respiratory infection after the first 7 days of life (n = 0) | 16 (4.8) | 19 (1.9) | 1.95 (0.49 to 7.69) | |