Number of problems in relation to practice, patient and doctor characteristics
| Characteristic | Incident rate ratio | 95% CI | P-value |
|---|---|---|---|
| Practice level | |||
| Deprivation: moderate versus affluent | 0.96 | 0.76 to 1.22 | 0.762 |
| Deprivation: deprived versus affluent | 1.15 | 0.90 to 1.47 | 0.255 |
| GP level | |||
| GP sex: female versus male | 1.04 | 0.87 to 1.26 | 0.649 |
| GP age: >40 years versus <40 years | 1.03 | 0.73 to 1.46 | 0.856 |
| GP ethnicity: other versus white | 1.01 | 0.58 to 1.76 | 0.975 |
| Years of practising as a GP: for each 10-year increase in age | 0.96 | 0.82 to 1.13 | 0.611 |
| Patient level | |||
| Patient age: for each 10-year increase in age | 1.08 | 1.02 to 1.13 | 0.003 |
| Patient sex: female versus male | 1.13 | 0.94 to 1.35 | 0.181 |
| Ethnicity: other versus white | 1.11 | 0.70 to 1.76 | 0.644 |
Based on mixed Poisson regression adjusting for clustering by GP.