Trend in absolute inequalities in the infant mortality rate (IMR) between the most deprived local authorities and the rest of England, before, during and after the English HI strategy period
| Period | Annual change in absolute gap in the IMR between the most deprived local authorities and the rest of England (95% CI) |
| Before 1983–1999 | 0.034 (0.001 to 0.067) |
| During 2000–2010 | −0.116 (–0.178 to –0.053) |
| After 2011–2017 | 0.042 (–0.042 to 0.125) |
N=11 305 (323 local authorities×35 years), overall R2=0.3857.
Trend is shown as the annual increase or decrease (minus values) in the absolute gap in the IMR (defined as the number of deaths under 1 per 1000 births in the local authority area).