Figure 5.

Effect of Quality Information on Predicted Number of Patients in Practices

Notes. Log percentage difference is $ln[{\widehat{n}}_j(q_{06/7})/{\widehat{n}}_j(0)]=ln(1+{\mathit{\delta }}_j)$ where ${\widehat{n}}_j(q_{06/07})$ is the number of patients predicted by the model in Table 2 to choose practice j when practices have their actual 2006/7 total QOF points and ${\widehat{n}}_j(0)$ is the number predicted from a model with the same covariates and distance specification as Table 2 but with all practice qualities set to the same value. δ _j is the proportionate difference.