The impact of COVID-19 quarantine on mental health: an observational study from an outpatient service for non-psychotic patients in Russia (Moscow)

We aimed to compare psychiatric hospital visits during the COVID-19 quarantine period with the same period in 2019, to reveal the predictors of underutilization of mental health services. We then investigated the fluctuation of telemedicine service during the quarantine period. The retrospective study included patients with non-psychotic mental disorders who consecutively visited the Moscow clinic. The number of outpatient visits, inpatient admissions, sociodemographic factors were analyzed. We assessed the sample within two periods -the "quarantine period" (March 30 -June 9, 2020) and "control period" (March 30 -June 9, 2019). Psychiatric visits decreased in older, retired and disabled persons, and increased among the unemployed. In multivariate analysis, the reduction became significant for the number of inpatient admissions. Telemedicine calls gradually increased from the start of the service, but decreased towards the end of the quarantine. In conclusion, referrals to outpatient and inpatient psychiatric services decreased during the quarantine period, with newly established TMS potentially compensating for that decrease. The strongest factor associated with visits during the pandemic is employment status.