Summary statistics of all patients in the study sample by financial year (FY)
| Variable | FY 2006/2007 | FY 2015/2016 |
| Mean (No) | Mean (No) | |
| No of index discharges | 5 204 263 | 6 219 153 |
| Patient age (years) | 57.42 | 59.46 |
| Female (%) | 54.02 (2 811 559) | 54.48 (3 391 862) |
| White (%) | 89.40 (4 652 641) | 87.76 (5 463 584) |
| Black (%) | 2.26 (118 127) | 2.55 (158 949) |
| Asian (%) | 4.13 (215 017) | 5.03 (313 120) |
| Other (%) | 1.48 (77 369) | 2.17 (135 425) |
| Length of stay in days (total days per year) | 3.16 (16 461 340) | 2.25 (14 029 556) |
| Patients discharged from quintile 1 (%)—IMD score (least deprived) | 20.90 (1 087 857) | 19.33 (120 3376) |
| Patients discharged from quintile 2 (%)—IMD score | 20.39 (1 061 572) | 19.74 (1 229 077) |
| Patients discharged from quintile 3 (%)—IMD score | 19.93 (1 037 591) | 20.15 (1 254 540) |
| Patients discharged from quintile 4 (%)—IMD score | 19.49 (1 014 601) | 20.17 (1 255 631) |
| Patients discharged from quintile 5 (%)—IMD score (most deprived) | 19.26 (1 002 642) | 20.60 (1 282 480) |
| Charlson comorbidities | 0.23 | 0.45 |
| Crude 30-day readmission rate (%) | 6.50 (338 565) | 6.73 (418 949) |
| Number of NHS trusts | 150 | 139 |
Summary statistics across all patients for each financial year. IMD score refers to the Index of Multiple Deprivation.
NHS, National Health Service.