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

gen mo = 0
replace mo = 1 if mobility == 2
replace mo = 2 if mobility == 3

gen sc = 0
replace sc = 1 if selfcare == 2
replace sc = 2 if selfcare == 3

gen ua = 0
replace ua = 1 if activity == 2
replace ua = 2 if activity == 3

gen pd = 0
replace pd = 1 if pain == 2
replace pd = 2 if pain == 3

gen ad = 0
replace ad = 1 if anxiety == 2
replace ad = 2 if anxiety == 3

gen m2 = 0
replace m2 = 1 if mobility == 3

gen p2 = 0
replace p2 = 1 if pain == 3
gen a2 = 0
replace a2 = 1 if anxiety == 3

gen n3 = 0
replace n3 = 1 if mobility == 3 | selfcare == 3 | activity == 3 | pain == 3 | anxiety == 3

gen EQ_index = 1 - 0.202 - (0.121 * mo) - (0.121 * sc) - (0.059 * ua) - (0.072 * pd) - (0.032 * ad) - (0.190 * m2) - (0.065 * p2)-  (0.046 * a2)- (0.139 * n3)
replace EQ_index = 1 if mobility == 1 & selfcare == 1 & activity == 1 & pain == 1 & anxiety == 1 
replace EQ_index = round(EQ_index, .001)