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

gen disut_mo = .
replace disut_mo = 0 if missing(disut_mo) & mobility == 1
replace disut_mo = 0.025 if missing(disut_mo) & mobility == 2
replace disut_mo = 0.034 if missing(disut_mo) & mobility == 3
replace disut_mo = 0.126 if missing(disut_mo) & mobility == 4
replace disut_mo = 0.314 if missing(disut_mo) & mobility == 5

gen disut_sc = .
replace disut_sc = 0 if missing(disut_sc) & selfcare == 1
replace disut_sc = 0.031 if missing(disut_sc) & selfcare == 2
replace disut_sc = 0.047 if missing(disut_sc) & selfcare == 3
replace disut_sc = 0.111 if missing(disut_sc) & selfcare == 4
replace disut_sc = 0.264 if missing(disut_sc) & selfcare == 5

gen disut_ua = .
replace disut_ua = 0 if missing(disut_ua) & activity == 1
replace disut_ua = 0.023 if missing(disut_ua) & activity == 2
replace disut_ua = 0.040 if missing(disut_ua) & activity == 3
replace disut_ua = 0.097 if missing(disut_ua) & activity == 4
replace disut_ua = 0.205 if missing(disut_ua) & activity == 5

gen disut_pd = .
replace disut_pd = 0 if missing(disut_pd) & pain == 1
replace disut_pd = 0.030 if missing(disut_pd) & pain == 2
replace disut_pd = 0.050 if missing(disut_pd) & pain == 3
replace disut_pd = 0.261 if missing(disut_pd) & pain == 4
replace disut_pd = 0.575 if missing(disut_pd) & pain == 5

gen disut_ad = .
replace disut_ad = 0 if missing(disut_ad) & anxiety == 1
replace disut_ad = 0.018 if missing(disut_ad) & anxiety == 2
replace disut_ad = 0.029 if missing(disut_ad) & anxiety == 3
replace disut_ad = 0.108 if missing(disut_ad) & anxiety == 4
replace disut_ad = 0.232 if missing(disut_ad) & anxiety == 5

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

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