Annual in-patient mortality for Queen Alexandra Hospital (QAH) (2004–2010) and University Hospital Coventry (UHC) (2006–2010)
| QAH | Baseline | After | |||||
|---|---|---|---|---|---|---|---|
| Calendar year | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Average age of adult inpatients | 62.6 (62.4–62.9) | 63.2 (62.9–63.1) | 63.1 (62.8–63.3) | 63.7 (63.5–64.0) | 64.2 (64.0–64.5) | 64.5 (64.2–64.7) | 66.3 (64.3–64.7) |
| All admissions | 33 983 | 34 919 | 36 367 | 37 963 | 40 622 | 39 553 | 38 694 |
| Admissions excluding day cases | 27 959 | 28 575 | 28 910 | 29 364 | 30 539 | 30 427 | 29 676 |
| Observed deaths (O) | 2168 | 2172 | 2055 | 2053 | 2132 | 1996 | 1904 |
| Crude mortality rate (MR) %* | 7.75 | 7.60 | 7.11 | 6.99 | 6.98 | 6.56 | 6.42 |
| % change in crude MR | −1.98 | −8.33 | −9.84 | −9.97 | −15.40 | −17.26 | |
| Relative risk (95% CI) cf. baseline year | 0.98 (0.93 to 1.04) | 0.92 (0.87 to 0.97) | 0.90 (0.85 to 0.96) | 0.90 (0.85 to 0.95) | 0.85 (0.80 to 0.90) | 0.83 (0.78 to 0.88) | |
| p value for relative risk cf. baseline year | 0.497 | 0.003 | <0.001 | <0.001 | <0.001 | <0.001 | |
| Expected deaths† (E) | 2216 | 2242 | 2277 | 2368 | 2359 | 2301 | |
| Deaths avoided (E-O) | 44 | 187 | 224 | 236 | 363 | 397 | |
| UHC | Baseline | After | |||||
| Calendar year | 2006 | 2007 | 2008 | 2009 | 2010 | ||
| Average age of adult inpatients | 63.0 (62.7–63.3) | 63.7 (63.4–64.0) | 64.0 (63.8–64.3) | 64.3 (64.1–64.6) | 64.9 (64.6–65.1) | ||
| All admissions | 30 878 | 31 990 | 36 282 | 39 496 | 40 483 | ||
| Admissions excluding day cases | 21 771 | 21 840 | 23 270 | 25 585 | 26 241 | ||
| Observed deaths | 1648 | 1688 | 1725 | 1675 | 1614 | ||
| Crude MR % * | 7.57 | 7.73 | 7.41 | 6.55 | 6.15 | ||
| % change in crude MR % | 2.10 | −2.07 | −13.51 | −18.75 | |||
| Relative risk (95% CI) cf. baseline year | 1.02 (0.95 to 1.09) | 0.98 (0.92 to 1.05) | 0.87 (0.82 to 0.93) | 0.82 (0.77 to 0.88) | |||
| p value for relative risk cf. baseline year | 0.565 | 0.568 | <0.001 | <0.001 | |||
| Expected deaths† | 1653 | 1761 | 1937 | 1986 | |||
| Deaths avoided | −35 | 36 | 262 | 372 | |||
*Observed deaths for 56 diagnoses accounting for 83% of inpatient deaths in England were used to calculate the annual crude mortality rate.
†The preintervention crude mortality rate was used to calculate the expected deaths in subsequent years based on the number of admissions with any of the 56 diagnoses in those years.