Segmented regression model results for trends in infant mortality at lower tier local authority level in 2014–2017 (per 100 000 live births per year)
| Level of income deprivation | Annual change (deaths per 100 000) in infant mortality (2014–2017) relative to previous trend (2000–2013) (95% CI) | P value for change in trend from previous period | |
| Quintile 1 (most affluent) | −4.19 | (−16.91 to 8.53) | 0.518 |
| Quintile 2 | 15.65 | (−2.27 to 33.57) | 0.087 |
| Quintile 3 | 3.89 | (−14.03 to 21.81) | 0.67 |
| Quintile 4 | 20.5 | (2.58 to 38.42) | 0.025 |
| Quintile 5 (most deprived) | 24.14 | (6.22 to 42.05) | 0.008 |
Estimates based on random-effects regression model using local authority panel data set of infant mortality from 2000 to 2017, n=5832 local authority years. See online supplementary web appendices 5–9 for full model output and checks.