Table 4.

Unadjusted and adjusted mean total costs according to hospital readmission status

	Unadjusted mean differencea (£)	95% CI for difference	p value	Adjusted mean differenceb (£)	95% CI for difference	p value
Other—non-respiratory	2,178	772 to 3,583	0.002	2,110	708 to 3,512	0.003
RSV—non-respiratory	11,327	5,015 to 17,639	<0.001	11,186	4,763 to 17,609	0.001
RSV—other respiratory	9,149	2,693 to15,606	0.005	9,076	2,515 to 15,637	0.007

Both models use a gamma distribution and identity link function

^aCalculated using a generalised linear model without covariates

^bCalculated using a generalised linear model with covariates representing birthweight, gestation, antenatal steroid use and surfactant use