Suppose that you are engaged in a CEA and need to assign weights to four health states for rheumatoid arthritis. You use the standard gamble (SG) and time trade-off (TTO) approach with 100 respondents. On average, these respondents chose immediate painless death if the probability of such an event were 10 percent in health state S1, 30 percent in S2, 50 percent in S3, and 60 percent in S4. When given an expected life span of 20 years for health state S1, 15 years for S2, 10 years for S3, and 5 years for S4, respondents were willing to give up 3 years, 5 years, 5 years, and 3 years, respectively, to be disease-free.

What should be the weights for each of these health states using the SG approach?

What should be the weights for each of these health states using the TTO approach?