Psychiatric and psychological factors in patient decision making concerning antidepressant use.

The observation that the use of antidepressants has strongly increased during the past decade implies that on a micro level doctors and patients more often decide that antidepressants are the appropriate treatment. Therefore, it is important to increase insight into patients' decision making regarding the use of antidepressants. The decision making model used in the present study was based on A. Bandura's (1986) social cognitive theory. Two cohorts of patients were recruited and followed for 9 months. Among patients who use antidepressants (N = 166), the stronger pros and weaker cons of discontinuation and self-efficacy predicted more proximal goal intentions. Goal intentions predicted discontinuation after 9 months. Among patients who had used antidepressants in the past (N = 73), stronger pros of discontinuation and the weaker perceived functions of antidepressants predicted a more positive evaluation of their present state, compared with when they still used antidepressants. These temporal comparisons, in turn, predicted renewed use of antidepressants after 9 months. The results provide a framework for supporting and influencing decision making with regard to the use of antidepressants.