“…While 9 out of 21 tools were used in primary care settings, the others were used only for inpatients. We identified 25 studies that investigated the correlation between patients’ complexity and health-related outcomes [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 40 , 41 , 42 , 43 ]. Two studies investigated the correlation between patients’ complexity with healthcare related costs [ 25 , 28 ].…”