sysuse cancer, clear la var died "Patient died" la def ny 0 "No" 1 "Yes", modify la val died ny recode studytime /// (min/10 = 1 "10 or less months") /// (11/20 = 2 "11 to 20 months") /// (21/30 = 3 "21 to 30 months") /// (31/max = 4 "31 or more months") /// , gen(stime) la var stime "To died or exp. end" la var drug "Drug type" la def drug 1 "Placebo" 2 "Trial drug 1" /// 3 "Trial drug 2", modify la val drug drug