“…These comprised patient characteristics [7], [12], [20], [21], [22], [23], [24], [25], [26], [27], Case Mix Group (CMG), DRG (Appendix S4), nursing diagnoses [7], [21], [24], [28], [29], [30] (Appendix S4), severity of illness [9], [22], [23], [25], [26], [30], [31], [32] (Appendix S5), patient acuity [12], [24], [30] (Appendix S5), comorbidities [7], [23], complications [7], [23], [25], [26], [33] and admission and discharge factors [22]. Three studies [21], [23], [30] investigated models estimating the demand for hospital care services.…”