Comparing the monetary value of a quality-adjusted life year from the payment card and the open-ended format

Abstract Background The payment card (PC) format and the open-ended (OE) are common methods in eliciting willingness-to-pay (WTP) of one additional quality-adjusted life year (QALY). aim this research is to compare these two formats monetary value a QALY. Methods A contingent valuation survey was carried out using pre-designed questionnaire with various hypothetical scenarios. difference between PC OE evaluated by two-sample equality test. Furthermore, generalized linear models were control observed heterogeneity test theoretical validity. Results In total, 461 individuals involved, among whom 235 (51%) answered question, while 226 (49%) question. Excluding zero response, mean WTP values for different scenarios varied dramatically, which from 13,278 280,177 RMB PC, 18,119 620,913 OE. tended elicit lower less serious condition higher more condition. However, median demonstrated insignificant all For both format, most variables found have significant effect on WTP/QALY. Moreover, joint estimation indicated statistically positive results. Further analysis that imbalanced response distribution caused main formats. Conclusions This insignificantly WTP/QALY estimates grouped data whereas significantly pooled data. These be valid. More about validity would recommended robust