The Child Mania Rating Scales (CMRS) are 21-item diagnostic screening measure designed to identify symptoms of mania in children and adolescents ages 9–17 using diagnostic criteria from the DSM-IV as reported by parents and teachers. The measure interviews the child's mood and behavior symptoms, asking parents and teachers to rate how often the symptoms have caused a problem for the child in the past month. Clinical studies have found the CMRS-P to be reliable and valid in the assessment of children's bipolar symptoms. The CMRS has also been found to be useful in differentiating cases of pediatric bipolar disorder from ADHD or no disorder, as well as delineating bipolar sub types. A meta-analysis comparing the different rating scales available found that the CMRS was one of the three best