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

gen disut_mo = .
replace disut_mo = 0 if missing(disut_mo) & mobility == 1
replace disut_mo = 0.027 if missing(disut_mo) & mobility == 2
replace disut_mo = 0.085 if missing(disut_mo) & mobility == 3
replace disut_mo = 0.187 if missing(disut_mo) & mobility == 4
replace disut_mo = 0.368 if missing(disut_mo) & mobility == 5

gen disut_sc = .
replace disut_sc = 0 if missing(disut_sc) & selfcare == 1
replace disut_sc = 0.024 if missing(disut_sc) & selfcare == 2
replace disut_sc = 0.072 if missing(disut_sc) & selfcare == 3
replace disut_sc = 0.15 if missing(disut_sc) & selfcare == 4
replace disut_sc = 0.232 if missing(disut_sc) & selfcare == 5

gen disut_ua = .
replace disut_ua = 0 if missing(disut_ua) & activity == 1
replace disut_ua = 0.011 if missing(disut_ua) & activity == 2
replace disut_ua = 0.065 if missing(disut_ua) & activity == 3
replace disut_ua = 0.146 if missing(disut_ua) & activity == 4
replace disut_ua = 0.219 if missing(disut_ua) & activity == 5

gen disut_pd = .
replace disut_pd = 0 if missing(disut_pd) & pain == 1
replace disut_pd = 0.044 if missing(disut_pd) & pain == 2
replace disut_pd = 0.128 if missing(disut_pd) & pain == 3
replace disut_pd = 0.311 if missing(disut_pd) & pain == 4
replace disut_pd = 0.48 if missing(disut_pd) & pain == 5

gen disut_ad = .
replace disut_ad = 0 if missing(disut_ad) & anxiety == 1
replace disut_ad = 0.02 if missing(disut_ad) & anxiety == 2
replace disut_ad = 0.074 if missing(disut_ad) & anxiety == 3
replace disut_ad = 0.161 if missing(disut_ad) & anxiety == 4
replace disut_ad = 0.264 if missing(disut_ad) & anxiety == 5

gen disut_total = disut_mo + disut_sc + disut_ua + disut_pd + disut_ad 

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