Table 3 Predicted incidence rate ratios (IRR) of infant mortality events obtained from negative binomial regression modelling using SIMD-IE

Reference category

2000

5 (least deprived)

Female

IRR for

Unit increase

Unit increase

Male

< 25 years

≥ 35 years

Infant mortality

0.97 * (0.96–0.97)

1.16 * (1.13–1.19)

1.22 * (1.15–1.30)

1.24 * (1.16–1.34)

1.16 * (1.07–1.26)

Neonatal mortality

0.97 * (0.96–0.97)

1.12 * (1.09–1.15)

1.20 * (1.12–1.30)

1.16 * (1.06–1.27)

1.18 * (1.07–1.30)

Post-neonatal mortality

0.97 * (0.96–0.98)

1.25 * (1.20–1.31)

1.26 * (1.13–1.40)

1.42 * (1.26–1.60)

1.12 (0.96–1.30)

Stillbirths

0.98 * (0.97–0.98)

1.13 * (1.11–1.15)

0.99 (0.94–1.05)

1.12 * (1.04–1.20)

1.37 * (1.28–1.47)

Extended perinatal mortality

0.97 * (0.97–0.98)

1.13 * (1.11–1.14)

1.06 * (1.02–1.11)

1.13 * (1.07–1.20)

1.30 * (1.23–1.38)