Table 8.
Effect Sizes for Quality and Other Practice Characteristics
| (1) | (2) | (3) | (4) | (5) | (6) | |
|---|---|---|---|---|---|---|
| Co‐efficient | Extra metres for 1 unit increase | Extra metres for 1 SD increase | Average marginal effect | Patients gained from 1 SD increase | Percentage increase in practice list from 1 SD increase | |
| QOF total points 2006/7 | 0.00222 | 2.96 | 191 | 0.0000786 | 917 | 16.48 |
| (0.00016) | (0.22) | (14) | (0.0000129) | (94) | (1.69) | |
| Average GP age (months) | −0.00214 | −2.85 | −229 | −0.0000758 | −1,002 | −18.01 |
| (0.00014) | (0.19) | (15) | 0.0000062) | (51) | (0.92) | |
| % female GPs | 0.00239 | 3.18 | 79 | 0.0000845 | 351 | 6.31 |
| (0.00034) | (0.45) | (11) | (0.0000130) | (34) | (0.61) | |
| % non‐Europ qualif GPs | −0.00527 | −7.02 | −247 | −0.0001867 | −1,085 | −19.50 |
| (0.00028) | (0.39) | (14) | (0.0000192) | (70) | (1.26) |
Extra metres: number of extra metres patients would be willing to travel for practice characteristic greater by 1 unit (column (2)) or 1 SD units (column (3)) increase in characteristic. Average marginal effect: average change in probability of patients from an LSOA choosing a practice from 1 unit increase in characteristic (1 QOF point, 1 month of average GP age, 1% female and non‐European qualified GPs). Patients gained: number of additional patients aged 25 and over choosing a practice if characteristic increased by 1 SD. Average marginal effects, average estimated patients gained and % increase in list are computed for the 415 practices which have at least 99% of their patients from LSOAs in the East Midlands. Standard errors are in parentheses. All coefficients and effects are significant at 0.1%. See Appendix B for details of calculations.