A Rating Scale for Mania: Reliability, Validity and Sensitivity

TLDR

The study introduces an eleven‑item clinician‑administered Mania Rating Scale (MRS) and aims to assess its reliability, validity, and sensitivity. The authors evaluated the MRS by measuring inter‑rater agreement, correlations with established scales, and its ability to predict hospitalization duration and treatment response. The MRS demonstrated high inter‑rater reliability (0.93), strong correlations with global ratings and other mania scales, predicted hospital stay length, and distinguished patients before and after two weeks of treatment as well as severity levels.

Abstract

Summary An eleven item clinician-administered Mania Rating Scale (MRS) is introduced, and its reliability, validity and sensitivity are examined. There was a high correlation between the scores of two independent clinicians on both the total score (0.93) and the individual item scores (0.66 to 0.92). The MRS score correlated highly with an independent global rating, and with scores of two other mania rating scales administered concurrently. The score also correlated with the number of days of subsequent stay in hospital. It was able to differentiate statistically patients before and after two weeks of treatment and to distinguish levels of severity based on the global rating.