ꏚ Major Findings
◦ 287 community dwellers could directly evaluate 17 status out of the 243 states of EQ-5D with time trade-off method.
◦ The variation of directly evaluated values was large and the standard deviation of value for each health state ranged between 0.1785 and 0.5010.
◦ The mean scores of the observed values were not statistically different in most 17 health states across several individual characteristics such as age, sex, urban/rural residency, housingtype(apartment/house), smoking status, or occupation.
◦ We found two new random-effect models, N3+I2-square model and I3+I2-square model, that produced the same value set which predicted logically consistent value socres for 243 EQ-5D health states. These models had never been found in the previous studies conducted in foreign countries.
ꏚ Expected Effect
◦ The value set of 243 health states can be used in cost-utility analyses where EQ-5D is used
as a measure of utility.
◦ The value set of 243 health states can also be used to calculate health-adjusted life expectancy(HALE) which is a summary measure of a population and also an indicator of disease-burden.