The role of psychiatric and behavioral factors in the practice of medicine.

The authors review the role of psychiatric and behavioral factors in the practice of medicine in three areas: 1) prevalence of psychiatric morbidity, 2) the role of behavioral or lifestyle factors in illness onset, and 3) the overlapping of psychiatric and behavioral factors with medical illness. Within each areas they review behavioral factors to the practice of medicine, the limits of current treatment approaches, and future research needs. In their final section they draw implications for health care delivery and manpower development.