“…That the scale detects a more general propensity to substance abuse has been strongly suggested by findings that "alcoholic" MAC scores are obtained by heroin addicts, polydrug abusers, massively obese persons awaiting bypass surgery, and male smokers (Krantiz, 1972;Lachar et al, 1976;Leon et al, 1979a,b;MacAndrew, 1981a). That the scale detects a more general propensity to substance abuse has been strongly suggested by findings that "alcoholic" MAC scores are obtained by heroin addicts, polydrug abusers, massively obese persons awaiting bypass surgery, and male smokers (Krantiz, 1972;Lachar et al, 1976;Leon et al, 1979a,b;MacAndrew, 1981a).…”