Table 3.

Effect of COACH program on unplanned rehospitalisations (n = 341 before and n = 365 after)

ITS unplanned rehospitalisation	Unadjusted	Adjusteda
β0, usual care level of the outcome (95% CI)	34.0 (20.2; 47.9)	11.3 (− 28.7; 51.2)
β1, baseline trend (95% CI)	-1.7 (− 4.8; 1.4)	−2.1 (− 5.2; 1.1)
β2, change in outcome immediately after the intervention (95% CI)	8.5 (−8.4; 25.5)	12.7 (−7.3; 32.7)
β3, change in the slope from before to after the intervention(95% CI)	2.3 (−1.7; 6.3)	−0.2 (−4.9; 4.6)

ITS interrupted time series analysis. β values were calculated using segmented regression analysis

^aAdjusted for baseline differences: help with medication use, all hospital contacts in the last 6 months, mean Charlson score