Derivation
variable: treatstartdate [treatment start date] (table[s]: derived variable)
variable: birth_date [date of birth] (table[s]: derived variable)
variable: mic_resD [microscopy result at diagnosis] (table[s]: derived variable)
variable: tbtype1 [TB type] (table[s]: tb_tbx, tb_tbxto2007, tbold_part1/2)
variable: tbtype2 [TB type] (table[s]: tb_tbx, tb_tbxto2007, tbold_part1/2)
variable: tbtype3 [TB type] (table[s]: tb_tbx, tb_tbxto2007, tbold_part1/2)
variable: treatint [type of treatment] (table[s]: tb_tbx, tb_tbxto2007)