age of first alcoholic drink
How old were you the first time you had an alcoholic drink, that is, a whole drink not just a sip? Do not include non-alcoholic or low alcohol drinks but do include shandy.
if (GRIDVARIABLES.ModeType = 1 & CASISTART.scac = 1 thru 3) | (GRIDVARIABLES.ModeType = 2) (Mode is face-to-face and has agreed to self-completion OR mode is telephone)
and if SCEVERDRNK = 1 (Ever had an alcoholic drink)