The brief psychiatric rating scale: effect of scaling system on clinical response assessment.
The Brief Psychiatric Rating Scale (BPRS) is an 18-item rating scale frequently used to assess change in psychopathology in schizophrenic patients in antipsychotic drug trials. BPRS items may be rated by the use of either a 1 to 7 or 0 to 6 scaling system, with the 1 or 0 rating indicating no pathology, respectively. When percent change in BPRS total score is used as an index of change, measurement considerations indicate that the 0 to 6 scaling system is preferable. Furthermore, when the 1 to 7 scaling system is used, patients whose initial BPRS values fall at the lower end of the range are classified as responders at a lower rate than are patients with higher initial scores. The adoption of the 0 to 6 scaling system for the BPRS and other rating scales, such as the Positive and Negative Syndrome Scale, is advocated.
Thompson
P A
PA
Department of Psychiatry, Case Western Reserve University School of Medicine, Cleveland, Ohio.
Buckley
P F
PF
Meltzer
H Y
HY
D014150:Antipsychotic Agents / Q000009:adverse effects / Q000627:therapeutic use*; D003024:Clozapine / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D015588:Observer Variation; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011594:Psychometrics; D012559:Schizophrenia / Q000188:drug therapy*; D012565:Schizophrenic Psychology
D014150:Antipsychotic Agents; D003024:Clozapine