Unadjusted/adjusted RRs and its 95% CIs before and after centralisation
| Area | Before (January 2008 to June 2010) | After (July 2010 to December 2014) | ||
| Unadjusted RR (95% CI) | Adjusted RR (95% CI) | Unadjusted RR (95% CI) | Adjusted RR (95% CI) | |
| 7-day in-hospital mortality | ||||
| Greater London | 1.14 (1.03 to 1.25) | 1.14 (1.03 to 1.26) | 1.08 (0.99 to 1.17) | 1.06 (0.98 to 1.16) |
| HASUs | 1.17 (1.02 to 1.34) | 1.14 (0.99 to 1.32) | 1.07 (0.97 to 1.18) | 1.04 (0.93 to 1.15) |
| The rest of England | 1.14 (1.10 to 1.18) | 1.14 (1.11 to 1.18) | 1.13 (1.10 to 1.16) | 1.12 (1.09 to 1.16) |
| 30-day in-hospital mortality | ||||
| Greater London | 1.11 (1.04 to 1.19) | 1.12 (1.10 to 1.14) | 1.11 (1.05 to 1.17) | 1.10 (1.04 to 1.17) |
| HASUs | 1.09 (0.99 to 1.20) | 1.09 (0.98 to 1.21) | 1.08 (1.02 to 1.16) | 1.07 (1.00 to 1.15) |
| The rest of England | 1.10 (1.08 to 1.13) | 1.10 (1.07 to 1.13) | 1.14 (1.12 to 1.16) | 1.12 (1.03 to 1.20) |
HASU, hyperacute stroke unit; RR, relative risk.