Child Mania Rating Scale-Parent Version: a valid measure of symptom change due to pharmacotherapy

The development of valid parent-report measures of symptom change in pediatric bipolar disorder (PBD) is imperative to evaluate the effectiveness of different treatment approaches; yet, few studies have tested the sensitivity of symptom measures. The current study evaluated the sensitivity of the Child Mania Rating Scale (CMRS-P) to detect symptom change over time in a treatment study for PBD.

Data on symptom change were drawn from a prospective six-week, double-blind, placebo-controlled, randomized outpatient medication treatment trial of risperidone versus divalproex. The sample included 66 children with Bipolar type I disorder. Measures were administered every week for six weeks of treatment.

The CMRS-P demonstrated statistically (p ≤ .05) and clinically significant change in symptom report from pre to post-test. Growth curve modeling indicated that the CMRS-P demonstrated overall similarity to the YMRS in the magnitude and trajectory of change over time. Finally, results indicate that the CMRS-P is able to detect response rates with moderate levels of agreement with other measures.

Limitations of this study include a relatively small sample size and uncertain generalizability beyond treatment trials.

The CMRS-P is short, easy to administer, and represents parent's report of symptoms, all strengths which make it a compelling treatment outcome tool. This preliminary evidence of its validity as a treatment outcome measure makes it applicable in other research settings and suggests its potential use in clinical settings.