******************************************************************
*STATA syntax code for the computation of index*
*values with the Indonesian value set (DCE and TTO)*
******************************************************************;

gen disut_mo = .
replace disut_mo = 0 if missing(disut_mo) & mobility == 1
replace disut_mo = 0.1317 if missing(disut_mo) & mobility == 2
replace disut_mo = 0.2265 if missing(disut_mo) & mobility == 3

gen disut_sc = .
replace disut_sc = 0 if missing(disut_sc) & selfcare == 1
replace disut_sc = 0.1017 if missing(disut_sc) & selfcare == 2
replace disut_sc = 0.1793 if missing(disut_sc) & selfcare == 3

gen disut_ua = .
replace disut_ua = 0 if missing(disut_ua) & activity == 1
replace disut_ua = 0.1441 if missing(disut_ua) & activity == 2
replace disut_ua = 0.2093 if missing(disut_ua) & activity == 3

gen disut_pd = .
replace disut_pd = 0 if missing(disut_pd) & pain == 1
replace disut_pd = 0.1256 if missing(disut_pd) & pain == 2
replace disut_pd = 0.2277 if missing(disut_pd) & pain == 3

gen disut_ad = .
replace disut_ad = 0 if missing(disut_ad) & anxiety == 1
replace disut_ad = 0.1283 if missing(disut_ad) & anxiety == 2
replace disut_ad = 0.2016 if missing(disut_ad) & anxiety == 3

gen disut_total = (disut_mo + disut_sc + disut_ua + disut_pd + disut_ad)^1.9013

gen EQ_index = . 
replace EQ_index = 1 - disut_total
replace EQ_index = round(EQ_index, .001)