What Is the Impact of COVID-19 Pandemic on Patients with Pre-Existing Mood or Anxiety Disorder? An Observational Prospective Study

Background and Objectives: This observational prospective study aims to examine the psychological and psychopathological impact of the pandemic stress on patients with pre-existing mood, anxiety and obsessive–compulsive disorders. Materials and Methods: The study includes 386 consecutive patients recruited from 10 March to 30 June 2020 among those being treated at the Institute of Psychopathology in Rome (Italy) with an age ≥18 years and meeting DSM-5 criteria for major depressive disorder (MDD) (35.2%), bipolar I (BD-I) (21.5%) or II (BD-II) (28.8%) disorder, obsessive–compulsive disorder (OCD) (7.5%), panic disorder (PD) (7.0%) or social anxiety (SA). A total of 34.2% had lifetime comorbid Axis I disorders and 15.3% had alcohol/drug abuse disorders. Using a semi-structured interview, we investigated if the impact of COVID-19 stress for patients has been similar, higher or lower than that of their family and friends and, for patients with relapse/symptoms worsening, if there was a relationship between the clinical condition worsening and the pandemic stress. Results: Compared with that experienced by their family members and friends, the psychological impact of pandemic stress was similar in 52.1% of the sample, better in 37.1% and worse in 10.8%. In 21 patients (5.4%), the stress triggered a recurrence or worsened the symptoms. Patients with OCD had a higher rate of worsening due to pandemic stress compared to patients with MDD (p = 0.033), although, overall, the χ² test was not significant among primary diagnoses (χ² = 8.368; p = 0.057). Conclusions: The psychological and psychopathological consequences of COVID-19 stress in our outpatients were very modest. The continuity of care offered during the lockdown could explain the results.