Reliability and validity of the telephone-based version of the Montgomery-Asberg depression rating scale for assessing depression in individuals with primary brain tumour.

ABSTRACT

This study aimed to examine interrater reliability and construct validity of the Montgomery-Asberg Depression Rating Scale (MADRS) semi-structured interview for assessing depression in adults with a primary brain tumour.Fifty adults with a primary brain tumour (mean age = 45.86, SD = 12.48) reporting at least mild distress (Distress Thermometer [DT] ≥ 4) were recruited from a multidisciplinary brain tumour clinic and administered a telephone-based cognitive screener, MADRS, Depression Anxiety Stress Scales (DASS) depression subscale and Generalised Anxiety Disorder-7 (GAD-7). Audiotaped interviews were transcribed and then scored by two independent raters.Interrater reliability for the MADRS total score was excellent (ICC = 0.98) and ranged from good to excellent (ICC = 0.83-0.96) for MADRS items. The MADRS total score was significantly associated with the DT, DASS depression, and GAD-7 (r = 0.50-0.76, p < 0.001), thus providing evidence of construct validity. Individuals with poorer cognitive function reported higher levels of depression.The findings provide psychometric support for the MADRS as a semi-structured interview for assessing depression after brain tumour. Further research investigating the sensitivity and specificity of the MADRS is recommended.

The Montgomery Asberg Depression Rating Scale can be used to reliably assess depression in individuals with primary brain tumour.Individuals with poorer cognitive function may be at greater risk of developing depression after brain tumour.Semi-structured interviews such as the Montgomery Asberg Depression Rating Scale may support clinicians to distinguish depressive symptoms from effects of the illness, thus helping to identify individuals who most warrant psychological support.