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Table 4 Comparison between the PC and the OE formats by different scenarios

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

Questionnaires Mean Difference 95% Interval of mean difference by bootstrap Equality test of mean (bootstrap) Equality test of median
Mild, 0.2 QALY 12,413 (− 2621, 27,294) 0.141 0.067
Mild, 0.4 QALY 3476 (− 10,464, 14,469) 0.598 0.903
Moderate, 0.2 QALY − 29,816 (− 108,607, 41,299) 0.477 0.595
Moderate, 0.4 QALY − 33,639 (− 82,653, 9596) 0.165 0.662
Severe, 0.2 QALY − 5590 (− 25,971, 12,205) 0.596 0.917
Severe, 0.4 QALY − 6591 (− 17,302, 2750) 0.22 0.408
Terminal illness, 0.2 QALY − 290,537 (− 638,371, 28,961) 0.113 0.623
Terminal illness, 0.4 QALY 11,600 (− 58,726, 78,265) 0.728 0.777
Immediate death, 0.2 QALY − 347,266 (− 865,403, − 3927) 0.28 0.522
Immediate death, 0.4 QALY − 52,396 (− 200,299, 104,131) 0.51 0.309