Association between the COVID‐19 pandemic and psychiatric symptoms in people with preexisting obsessive‐compulsive, eating, anxiety, and mood disorders: a systematic review and meta‐analysis of before‐after studies

AIM: To determine whether the coronavirus disease 2019 (COVID-19) pandemic was associated with a change in psychiatric symptoms in people with preexisting obsessive-compulsive, eating, anxiety, and mood disorders compared to their prepandemic levels. METHODS: We searched MEDLINE, CINAHL, PsycINFO, and Embase from inception until February 16, 2022. Studies were included if they reported prepandemic and during-pandemic psychiatric symptoms, using …