Development and validation of the Maudsley Modified Patient Health Questionnaire (MM-PHQ-9).
Phillippa HarrisonSyndi WaltonDiede FennemaSuqian DuanTanja JaeckleKimberley A GoldsmithEwan CarrMark AshworthAllan H YoungRoland ZahnPublished in: BJPsych open (2021)
These results indicate that the MM-PHQ-9 is a valid and reliable measure of depressive symptoms in paper and mobile app format, although further validation is required. The measure was sensitive to change, demonstrating suitability for use in routine outcome assessment.