National representativeness of practicesa
| Characteristic | English population | Study cohort |
|---|---|---|
| Number of practices | 7819 | 30 |
| SOA Index of Multiple Deprivation 2010 | ||
| Mean (SD) | 26.2 (17.1) | 26.1 (16.1) |
| 10th–50th–90th percentile | 7.2, 22.1, 51.8 | 8.1, 20.3, 52.7 |
| Practice list size 2010–2011 | ||
| Mean (SD) | 6882 (4172) | 6346 (3226) |
| 10th–50th–90th percentile | 2350, 6077, 12 369 | 2706, 5384, 11 468 |
| Overall QOF achievement 2010–2011 | ||
| Mean (SD) | 89.2% (4.0%) | 90.7% (2.3%) |
| 10th–50th–90th percentile (%) | 85.1, 89.8, 93.0 | 87.9, 90.6, 94.1 |
↵a Practices were sampled from the following 14 primary care trusts: Bath and North East Somerset, Birmingham East and North, Bristol, Bury, Devon, Enfield, Haringey, Kirklees, North Somerset, Nottinghamshire county teaching PCT, Oldham, Somerset, South East Essex, and Stockport. SD = standard deviation. SOA = super output area.