Psychometric evaluation of the German version of the Mild Behavioural Impairment Checklist (MBI‐C)

Abstract

AbstractBackgroundNeuropsychiatric symptoms (NPS) are common in pre‐dementia state and are associated with an increased risk of dementia. The concept of Mild Behavioral Impairment (MBI) addresses this circumstance. However, to date, instruments that measure MBI in a standardized method are lacking. Therefore, the Mild Behavioral Impairment Checklist (MBI‐C) was developed on the basis of the MBI diagnostic criteria. Our aim was to psychometrically evaluate the German version of the MBI‐C.MethodWe interviewed 86 dyads of individuals with either subjective cognitive impairment (SCD), mild cognitive impairment (MCI), or cognitively healthy individuals, paired each of them with a relative and test the reliability, validity and acceptance of the MBI‐C.ResultThe internal consistency of both MBI‐C versions were at a questionable to acceptable level (α = 0.64‐0.86) and the interrater reliability was good to excellent (patients: ICC = 0.94, CI [0.91–0.96]; informants: ICC = 0.86, CI [0.79–0.90]). Informant‐rated MBI‐C correlated strongly with the Neuropsychiatric Inventory (NPI) total score (r = 0.51; p ≤.001). All participants found the MBI‐C acceptable.ConclusionThe German MBI‐C is an instrument to assess MBI in healthy individuals, individuals with SCD, and those with MCI. It has acceptable psychometric properties. Further studies should address a larger sample of individuals in a pre‐dementia state to confirm the findings of our study. Moreover, the factor structure should be investigated.