Table 1.

Attributes and levels in discrete choice experiment

Attributes	Levels
The rate that psoriasis (e.g. redness and dandruff) disappears by more than 90% 1 month after starting the treatment	10 patients in 100 20 patients in 100 30 patients in 100
The rate that psoriasis (e.g. redness and dandruff) disappears by more than 90% and the efficacy is sustained 1 year after starting the treatment	50 patients in 100 65 patients in 100 80 patients in 100
The rate that psoriasis (e.g. redness and dandruff) disappears by more than 90% and the efficacy is sustained approximately half year after stopping the treatment	20 patients in 100 40 patients in 100 60 patients in 100
Frequency of the treatment	Every 2 weeks, at home Every 4 weeks, at home Every 8 weeks, at hospital Every 12 weeks, at hospital
Monthly average co‐payment of 1st year and 2nd year and thereafter	1st year / 2nd year and thereafter
	¥26 000 / ¥15 000
	¥35 000 / ¥22 000
The annual rate of serious infectious events requiring hospitalization including serious infections such as pneumonia requiring hospitalization	1 patient in 100 2 patients in 100