Treatment participation and outcome in a program for problem drinker-drivers.

Relationships were examined between 13 predictor variables and two criteria of improvement in a program for problem drinker-drivers. Four measures of social background (income, educations, age, marital status), four measures of psychopathology based on the Minnesota Multiphasic Personality Inventory (MMPI), one measure of general alcoholism, and four indicators of treatment involvement served as predictor variables. Two factorially derived criteria served as outcome indicators, one reflecting general improvement, the other reflecting improved social adjustment, but a failure to reduce drinking. This second factor was interpreted as indicating resistance. Analysis included partial correlation and multiple regression, from which explained variance was completely partitioned into sources unique to each predictor, and sources shared by combinations of predictors. Results suggested that with other factors controlled, treatment involvement was linked both to improvement and to resistance. Similar conclusions were suggested for social background, but slightly different ones for psychopathology and alcoholism. Psychopathology was uniquely related to improvement; alcoholism, to resistance.