Table 2

Unit-specific changes estimated by R-MITS preintervention and postintervention

Outcomes	Unit	Change-points	Changes in slope			Changes in intercept (δ_i ^τ)
Outcomes	Unit	Change-points	Prechange (β_i1 ^τ)	Postchange (β_i1 ^τ+Δ_i ^τ)	Change (Δ_i ^τ)	Changes in intercept (δ_i ^τ)
CMI mean	Total institutions	March 2020****	−0.0002	0.0013	0.0015****	0.0100
	Tertiary institutions	February 2020*	−0.0001	0.0008	0.0009**	0.0015
	Secondary institutions	January 2020****	−0.0012	0.0019	0.0031****	−0.0099
CPH mean	Total institutions	January 2020***	−6.4420	−5.2860	1.1560	909.9000**
	Tertiary institutions	January 2020**	−18.7100	−43.3100	−24.6000	1957.0000***
	Secondary institutions	April 2020***	8.5540	−0.8039	−9.3580	1075.0000***
CEI mean	Total institutions	June 2019****	0.0011	0.0024	0.0013**	−0.0505**
	Tertiary institutions	June 2019****	0.0020	0.0005	−0.0015*	−0.0238
	Secondary institutions	April 2020****	0.0003	0.0015	0.0012*	0.0115
ALOS mean	Total institutions	January 2020****	−0.0202	−0.0392	−0.0190*	1.0710***
	Tertiary institutions	January 2020*	−0.0488	−0.0618	−0.0130	0.9115*
	Secondary institutions	January 2020****	−0.0041	−0.0261	−0.0220**	1.1540***
TEI mean	Total institutions	April 2020***	0.0006	−0.0005	−0.0011	0.0659**
	Tertiary institutions	June 2020	−0.0010	−0.0005	0.0005	−0.0231
	Secondary institutions	April 2020****	0.0016	−0.0002	−0.0018*	0.1102***

Significance level α=0.05.
*P<0.05, **P<0.01, ***P<0.001, ****P<0.0001.
ALOS, average length of stay; CEI, cost efficiency index; CMI, case mix index; CPH, cost per hospitalisation; R-MITS, robust multiple interrupted time series; TEI, time efficiency index.