Treatment costs
Costs were collected from societal perspective, so the costs included direct medical (DMC) and non-medical costs (DNMC) as well as indirect costs (IC). DMC included patient’s hoteling in hospital, medications used for hospital patients, laboratory and pathology tests, surgical costs, and other health services for each patient in the inpatient and day case tonsillectomy group. DNMC included the transportation costs for patients and their companions, the money paid for accommodation and meals by patients’ companions for both hospitalized and day-to-day tonsillectomy in hospital. IC also included the patients’ average of absence days from work, the companions’ average of absence days from work to take care of their patients and the lost productivity.
Costs calculation was according to tariffs of 2018 in the international dollar (purchasing power parity (PPP)). Furthermore, the exchange rate of each PPP$ was equal to 12800 rials (IRR)(13).