| #Hospital | Hospital identifier |
| #Site | Location of the hospital |
| Year | Year (most recent year in the SQLape_input.txt file, with at least 10% of records) |
| #Patient | Patient identifier |
| #Case | Index stay identifier (index stay = eligible for a possible readmission) |
| Age | Age at admission |
| Gender | 1 = male, 2 = female |
| Previous | Hospitalization during the six months prior to admission date |
| Programmed | 1 = planned, 0 = unplanned (corresponding to “admission mode” = 1 or 3 in SQLape_input.txt file) |
| #Group-AR | Clinical groups, used to compute expected rates (labels in Excel table) |
| AdmissionDate | Admission date of the index stay (each eligible discharge) |
| DischargeDate | Discharge date of the index stay (each eligible discharge) |
| AR0 | Expected rate (see prediction models for more details, benchmark) |
| AR1 | Observed rate (internal or external, = 1 if potentially avoidable readmission, 0 if not) |
| ReadmissionDate | Admission date of the readmission stay (31.12.2999 if no readmission) |
| ARDelay | Admission date of the readmission – Discharge date of the index stay |
| #Readmission | Identifier of the readmission |
| ReadmissionHospital | Identifier of the hospital of readmission |
| AR1i | Observed internal rate (= 1 if potentially avoidable readmission in the same hospital, 0 if not) |
| AR0_ANQ | Expected rate (all Swiss hospitals) |
