Design: A stepwise regression analysis using both community members and rehabilitation patients in treatment for pain or a physical injury was utilized to determine which of the Battery for Health Improvement (BHI 2) scales and items predicted the Kill-MD wish, and were subsequently cross-validated using a separate group of subjects.
Subjects: A total of 777 rehabilitation patients and 1487 nonpatients were used in this study.
Setting: Patients were obtained from a variety of physical rehabilitation and chronic pain settings in the United States of America.
Results: Rehabilitation patients as compared to nonpatients had significantly higher percentages (5.5% to 1.9%) affirming the Kill-MD wish. At cross validation, eleven BHI 2 variables explained 37.7% of the variance for the Kill-MD wish question: Anger with MD; violent ideation; suicide ideation; perceived harmful treatment; addiction to prescription medication; feeling dangerous; feeling forced to see a physician who isn't trusted; perceiving the physician as incompetent; having a suicide plan; hearing voices; and having spent more than one week in jail. The strongest single predictor was the BHI 2 Doctor Dissatisfaction scale, which explained 22.6% of the variance in the Kill-MD Wish.
Conclusions: There is significant hostility to physicians in certain rehabilitation patient groups as demonstrated by the frequency of the Kill-MD wish. Some of the Kill-MD Wish predictors are the same as previously identified violence/homicide risk factors. This study, however, has revealed some unique predictors relating to the patient-physician interaction.