Table 11.
Intensive care outcomes in phase two of Safer Patients Initiative (SPI2). Median and interquartile ranges for control and intervention hospitals, before and after intervention period*
| Intensive and critical care outcomes* | Control hospitals | SPI2 hospitals | Difference in difference | |||||
|---|---|---|---|---|---|---|---|---|
| Before | After | Before | After | Change (99% CI)† | P value | |||
| Adjusted mortality ratio | 1.14 (0.99-1.32) | 1.24 (1.02-1.33) | 1.04 (0.90-1.15) | 0.97 (0.90-1.15) | 0.09 (−0.11 to 0.29) | 0.25 | ||
| Mean LOS (hours) | 144 (117-174) | 147 (126-185) | 102 (82-130) | 103 (81-137) | 5.86 (−22.78 to 34.50) | 0.60 | ||
| Mean APACHE II score | 20.4 (17.7-22.6) | 19.0 (17.1-20.8) | 21.1 (19.1-23.0) | 20.3 (17.8-21.8) | −0.83 (−3.63 to 1.98) | 0.459 | ||
| Mean ICNARC score | 22.3 (19.5-26.3) | 20.7 (18.0-23.5) | 22.6 (21.2-25.3) | 22.2 (19.7-25.1) | −2.26 (−6.39 to 1.87) | 0.16 | ||
LOS=length of stay; APACHE=acute physiological and chronic health evaluation; ICNARC=Intensive Care National Audit and Research Centre.
*Before period is October 2006 to March 2007 and after period is October 2008 to March 2009.
†Change <1 favours SPI2.