Akaike Information Criterion values related to the statistical sensitivity analysis on potential multilevel models
| Multilevel model | Levels of analysis | Explanatory variables | AIC |
|---|---|---|---|
| Two-level regression | (Patient)—GP | Intercept-only | 12 617.83 |
| Two-level regression | (Patient)—GP | Patients’ characteristics | 11 547.13 |
| Three-level regression | (Patient)—GP—LHD | Patients’ characteristics | 11 502.37 |
| Two-level regression | (Patient)—LHD | Patients’ characteristics | 11 500.38 |
| Three-level cross-classified regression | (Patient)—LHD/HoD | Patients’ characteristics | 11 431.07 |
AIC, Akaike Information Criterion; GP, general practitioner; HoD, hospital of discharge; LHD, local health district.