Table 2.
Predictors of infant mortality by primary care trust in England—univariate models
| Item | Relative risk (95% CI)* | P value |
|---|---|---|
| Deprivation index | 1.018 (1.015 to 1.020) | <0.0001 |
| Spearhead status | 1.365 (1.274 to 1.462) | <0.0001 |
| Birth rate by ethnicity†: | ||
| Mixed race | 1.123 (1.068 to 1.180) | <0.0001 |
| Black | 1.058 (1.033 to 1.082) | <0.0001 |
| Indian | 1.063 (1.037 to 1.090) | <0.0001 |
| Pakistani | 1.080 (1.061 to 1.099) | <0.0001 |
| Bangladeshi or other Asian | 1.071 (1.043 to 1.101) | <0.0001 |
| Chinese‡ | 4.66×102 (4.98×10−2 to 4.37×106) | 0.187 |
| Maternity spend per birth over 3 year period† | 0.709 (0.615 to 0.818) | <0.0001 |
| Yearly maternity spend by year† | 0.920 (0.834 to 1.015) | 0.095 |
| Birth rate by maternal age: | ||
| <16 years‡ | 4.12×1026 (3.90×1015 to 4.34×1037) | <0.0001 |
| <18 years† | 1.341 (1.255 to 1.431) | <0.0001 |
| >35 years† | 0.553 (0.495 to 0.618) | <0.0001 |
*Relative risk of a unit change in the X value (that is, antilog of parameter estimate).
†Log transformed rate.
‡Log transformed (fractional rate+1).