Table 4 |
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Multilevel regression analysis of the explanatory variables on the overall range of different medicines prescribed by GPs in 2001 |
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Empty model |
Full model |
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|
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|
Estimate (standard error) |
Estimate (standard error) |
Hypothesis |
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practice level fixed effects |
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|
- prescriptions per patient |
0.2583 (0.1005)* |
Confirmed |
|
|
GP level fixed effects: |
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- visits representatives industry |
0.9289 (0.0456)* |
Confirmed |
|
|
- individual list size |
0.0000765(0.0002074)* |
Confirmed |
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variance components: |
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practice level intercept |
0.1276(0.1521) |
0.2684(0.1424) |
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|
GP level intercept |
0.8419(0.1749)* |
0.5914(0.1324)* |
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intraclass correlation |
13.2% |
31.2% |
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|
|
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*p < 0. 05, one-tailed; N(practices) = 93; n(GPs) = 138. |
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de Bakker et al. BMC Health Services Research 2007 7:132 doi:10.1186/1472-6963-7-132 |
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