Appendix 5.
Multiple regression of practice attributes in relation to provision of particular time periods. Practices providing extended hours, clustered by PCT (n = 405)
| Logit: providing appointments Before 8 am (yes/no) Multiple regression | Coefficient | Standard error | z | P>|z| | 95% CI |
|---|---|---|---|---|---|
| Change in demand for | |||||
| Period before 8 am | 15.76 | 12.98 | 1.21 | 0.23 | -9.68 to 41.41 |
| Period after 6.30 pm | –3.67 | 4.37 | –0.84 | 0.40 | –12.23 to 4.90 |
| Period Saturday | 0.74 | 3.11 | 0.24 | 0.81 | –5.35 to 6.82 |
| Period Sunday | –13.62 | 6.10 | –2.23 | 0.03a | –25.57 to –1.66 |
| Practice size | 0.00 | 0.00 | 2.25 | 0.02 | 0.00 to 0.00 |
| Index of Multiple Deprivation | -0.02 | 0.01 | -1.54 | 0.12 | -0.05 to 0.01 |
| QOF score | 0.00 | 0.00 | 0.09 | 0.93 | -0.01 to 0.01 |
| Change in satisfaction with opening hours | 2.73 | 3.18 | 0.86 | 0.39 | -3.50 to 8.97 |
| Percentage patients >45 years | -2.44 | 2.15 | -1.14 | 0.26 | -6.65 to 1.77 |
| Proportion UK graduate doctors | 0.40 | 0.35 | 1.13 | 0.26 | -0.29 to 1.09 |
| Change in satisfaction for QOF questions | 0.71 | 1.16 | 0.62 | 0.54 | -1.55 to 2.98 |
| QOF points realating to appointments 08/09 | 0.00 | 0.01 | 0.28 | 0.78 | -0.01 to 0.01 |
| _cons | -1.20 | 2.61 | -0.46 | 0.65 | -6.31 to 3.91 |
| Logit: providing appointments After 6.30 pm (yes/no) Multiple regression | Coefficient | Standard error | z | P>|z| | 95% CI |
| Change in demand for | |||||
| Period before 8 am | –5.44 | 12.01 | –0.45 | 0.65 | –28.99 to 18.10 |
| Period after 6.30 pm | –4.61 | 5.08 | –0.91 | 0.37 | –14.57 to 5.36 |
| Period Saturday | 13.97 | 1.41 | 9.88 | <0.001 | 11.19 to 16.74 |
| Period Sunday | 1.15 | 4.29 | 0.27 | 0.79 | –7.26 to 9.56 |
| Practice size | 0.00 | 0.00 | -0.39 | 0.70 | 0.00 to 0.00 |
| Index of Multiple Deprivation | 0.00 | 0.01 | -0.30 | 0.77 | -0.03 to 0.02 |
| QOF score | 0.00 | 0.00 | -0.68 | 0.50 | -0.01 to 0.00 |
| Change in satisfaction with opening hours | -3.30 | 3.44 | -0.96 | 0.34 | -10.04 to 3.44 |
| Percentage patients >45 years | -2.90 | 1.95 | -1.49 | 0.14 | -6.72 to 0.92 |
| Proportion UK graduate doctors | -2.00 | 0.36 | -1.18 | 0.24 | -1.13to0.28 |
| Change in satisfaction for QOF questions | 0.71 | 1.06 | -1.89 | 0.06 | -4.07 to 0.08 |
| QOF points realating to appointments 08/09 | 0.00 | 0.01 | 0.22 | 0.83 | -0.02 to 0.03 |
| _cons | 3.23 | 3.82 | 0.85 | 0.40 | -4.26 to 10.73 |
| Logit: providing appointments On Saturdays (yes/no) Multiple regression | Coefficient | Standard error | z | P>|z| | 95% CI |
| Change in demand for | |||||
| Period before 8 am | –15.71 | 9.96 | –1.58 | 0.12 | –35.24 to 3.81 |
| Period after 6.30 pm | 3.65 | 4.11 | 0.89 | 0.37 | –4.40 to 11.70 |
| Period Saturday | –16.74 | 2.85 | –5.87 | <0.001 | 11.19 to 16.74 |
| Period Sunday | 4.30 | 13.12 | 0.33 | 0.74 | –21.42 to 30.03 |
| Practice size | 0.00 | 0.00 | 5.49 | <0.001 | 0.00 to 0.00 |
| Index of Multiple Deprivation | 0.01 | 0.01 | 0.90 | 0.37 | -0.01 to 0.02 |
| QOF score | 0.00 | 0.00 | -0.77 | 0.44 | -0.01 to 0.00 |
| Change in satisfaction with opening hours | 1.39 | 3.55 | 0.39 | 0.70 | -5.57 to 8.36 |
| Percentage patients >45 years | 4.68 | 3.10 | 1.51 | 0.13 | -1.41 to 10.76 |
| Proportion UK graduate doctors | -0.50 | 0.51 | -0.98 | 0.33 | -1.49 to 0.49 |
| Change in satisfaction for QOF questions | 2.28 | 0.94 | 2.42 | 0.02 | 0.43 to 4.12 |
| QOF points realating to appointments 08/09 | 0.00 | 0.01 | -0.02 | 0.98 | -0.02 to 0.02 |
| _cons | 0.71 | 2.92 | 0.24 | 0.81 | -5.00 to 6.43 |
a
The decreased demand for Sunday if appointments before 8 am are offered could not be reproduced in a simple logistic regression and should be interpreted with caution.