Table 4.
Odds ratios for ≥3 reported hospital admissions at 9 months and 5 years of age
| ≥3 hospital admissions | Gestation at birth (weeks) | ||||
|---|---|---|---|---|---|
| <32 | 32-33 | 34-36 | 37-38 | 39-41 | |
| Birth to 9 months: | (n=225) | (n=192) | (n=1107) | (n= 3655) | (n=12 538) |
| No (%) | 16 (6.6) | 7 (3.5) | 28 (2.9) | 39 (1.2) | 86 (0.6) |
| Unadjusted odds ratio (95% CI) | 14.1 (7.2 to 27.7) | 7.7 (2.9 to 20.3) | 5.6 (3.3 to 9.7) | 2.0 (1.4 to 3.1) | 1 |
| Adjusted* odds ratio (95% CI) | 13.7 (6.5 to 29.2) | 7.8 (2.9 to 20.7) | 5.1 (3.0 to 8.8) | 1.9 (1.3 to 2.9) | 1 |
| Adjusted* population attributable fraction—% (95% CI) | 7.2 (2.3 to 12.4 ) | 3.4 (0.1 to 7.6 ) | 14.3 (6.3 to 23.1 ) | 11.8 (3.0 to 21.7 ) | – |
| 17.7 (8.6 to 27.4) | |||||
| 9 months to 5 years: | (n=147) | (n=139) | (n=745) | (n=2563) | (n=8989) |
| No (%) | 21 (13.6) | 11 (6.9) | 44 (4.9) | 123 (3.9) | 285 (2.8) |
| Unadjusted odds ratio (95% CI) | 6.2 (3.4 to 11.4) | 3.0 (1.4 to 6.3) | 2.0 (1.4 to 2.8) | 1.5 (1.1 to 1.9) | 1 |
| Adjusted* odds ratio (95% CI) | 6.0 (3.2 to 11.4) | 3.0 (1.4 to 6.2) | 1.9 1.3 to 2.7) | 1.4 (1.1 to 1.8) | 1 |
| Adjusted* population attributable fraction—% (95% CI) | 3.8 (1.3 to 6.5) | 1.6 (0.1 to 3.7) | 4.1 (1.0 to 7.7) | 7.2 (1.4 to 13.6) | – |
| 5.7 (2.0 to 10.0) | |||||
All percentages and odds ratios are weighted with sampling and non-response weights.
*Adjusted for child’s age at interview, sex, and ethnicity; maternal age at birth, marital status, education, and occupation; whether child was mother’s firstborn; duration of breast feeding; and maternal smoking and alcohol intake during pregnancy.