Table 3.
Adjusted Cox’s proportional hazard ratios comparing incidence of type 1 diabetes in cohorts of children born at different gestational ages
| Gestational age (weeks) | Type 1 diabetes (n) | Partially adjusteda HR (95% CI) | Further adjustedb HR (95% CI) | Fully adjustedc HR (95% CI) |
|---|---|---|---|---|
| Preterm: <37 | 204 | 1.29 (1.12, 1.50) | 1.19 (1.03, 1.38) | 1.17 (1.01, 1.36) |
| Early term: 37–38 | 726 | 1.33 (1.22, 1.46) | 1.27 (1.16, 1.39) | 1.24 (1.13, 1.36) |
| Full term: 39–40 | 1382 | Reference | Reference | Reference |
| Late term: 41 | 520 | 0.95 (0.86, 1.05) | 0.95 (0.86, 1.05) | 0.95 (0.86, 1.06) |
| Post-term: 42–43 | 137 | 1.14 (0.95, 1.35) | 1.14 (0.96, 1.36) | 1.14 (0.96, 1.36) |
aAdjusted for infant sex
bAdjusted for infant sex and maternal type 1 diabetes
cAdjusted for infant sex, maternal type 1 diabetes, gestational diabetes, maternal obesity, maternal age, deprivation quintile and Caesarean section
Covariates were included in the model categorised as presented in Table 1