“…One study 35 converted patients' SF-36 scores to QALYs using the SF-6D excel scoring programme (Table S2). The two studies 31,32 Of the 23 studies, perspectives included societal measures, [21][22][23][24]33,35,37 the healthcare systems, [28][29][30]32,36,41 and patient or thirdparty payer, [25][26][27]30,35,40 whereas 6 studies did not explicitly state the perspective used in their analysis 15,31,34,38,39,42 (Table 1). The costs of interventions included in the analyses showed marked differences in their scope and categorization and were reported in substantially differing forms such as direct costs, indirect costs, recurrent and capital costs, professional charges, treatment and total cost.…”