PREDICTING THE RATE OF PHYSICIAN-ACCEPTED INTERVENTIONS BY HOSPITAL PHARMACISTS IN THE UNITED-KINGDOM

Pharmacists' clinical interventions in a group of British hospitals we re counted, and a model to determine factors that affected the interve ntion rate was developed. All pharmacists who visited patient wards in 27 acute care hospitals recorded their daily ward visits and their cl inical interventions during five consecutive days (Monday through Frid ay) in June 1993. An intervention was defined as any recommendation ma de with the intent of changing drug treatment. Mixed-model Poisson reg ression was used to try to explain variations in the intervention rate , defined as the number of physician-accepted interventions divided by the number of occupied-bed days. Possible predictors of intervention rate considered were characteristics of the hospitals, the wards, and the pharmacists. During the study period, 248 pharmacists visited 10,4 78 beds and proposed 3,501 interventions. Of these interventions, 3371 were accepted, 56 were rejected, and 74 were unresolved. The most fre quent reasons for the interventions involved the dose (29%), the need for therapy (21%), the choice of drug (14%), and the route (12%). Ward type, pharmacist grade, and the total time the pharmacist spent on th e wards were significant predictors of the intervention rate. To valid ate the model, data were collected during the same period in 1994; the model predicted the number of interventions within 1 of the actual nu mber in 82% of cases. In a model explaining the factors that affected the rate of physician-accepted pharmacist interventions in acute care hospitals in the United Kingdom, ward type, pharmacist grade, and tota l time spent on the ward by the pharmacist were significant predictors of the intervention rate.