Table 2.
Unit-specific changes estimated by R-MITS preintervention and postintervention
| Outcomes | Unit | Change-points | Changes in slope | Changes in intercept (δi τ) |
||
| Prechange (βi1 τ) |
Postchange (βi1 τ+Δi τ) |
Change (Δi 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.