Behavioral validation of the University of Michigan REM behavior disorder questionnaire in the synucleinopathies

Many questionnaires have been proposed to collect data related to dream enactment. These are typically validated by reference to objective measurements of polysomnography, which incorporate physiologic recording of muscle activity during sleep. Another approach to such questionnaire validation would be the direct behavioral observations of patients' sleep. In the course of an ongoing study, we examined the association between sleep technologists' observations of dream enactment on two consecutive sleep laboratory nights and patients' and bedpartners' responses on the University of Michigan REM Behavior Disorder Questionnaire (UMRBDQ). Results suggested good correspondence between laboratory-based observations and questionnaire responses that did not appear to be impacted by whether the patient or the bedpartner completed the questionnaire. These results suggest utility of the UMRBDQ to identify individuals who have dream enactment during sleep.