Background There is evidence that the COVID-19 pandemic has negatively affected mental health, but most studies have been conducted in the general population. Aims To identify factors associated with mental health during the COVID-19 pandemic in individuals with pre-existing mental illness. Method Participants (N = 2869, 78% women, ages 18–94 years) from a UK cohort (the National Centre for Mental Health) with a history of mental illness completed a cross-sectional online survey in June to August 2020. Mental health assessments were the GAD-7 (anxiety), PHQ-9 (depression) and WHO-5 (well-being) questionnaires, and a self-report question on whether their mental health had changed during the pandemic. Regressions examined associations between mental health outcomes and hypothesised risk factors. Secondary analyses examined associations between specific mental health diagnoses and mental health. Results A total of 60% of participants reported that mental health had worsened during the pandemic. Younger age, difficulty accessing mental health services, low income, income affected by COVID-19, worry about COVID-19, reduced sleep and increased alcohol/drug use were associated with increased depression and anxiety symptoms and reduced well-being. Feeling socially supported by friends/family/services was associated with better mental health and well-being. Participants with a history of anxiety, depression, post-traumatic stress disorder or eating disorder were more likely to report that mental health had worsened during the pandemic than individuals without a history of these diagnoses. Conclusions We identified factors associated with worse mental health during the COVID-19 pandemic in individuals with pre-existing mental illness, in addition to specific groups potentially at elevated risk of poor mental health during the pandemic.

1. Dis s o ci a bl e eff e c t s of c o m pl e m e n t C 3 a n d C 3 a R o n s u rviv al a n d m o r p h olo gy of a d ul t b o r n hi p p o c a m p al n e u r o n s , p a t t e r n s e p a r a tio n, a n d c o g ni tiv e flexibility in m a l e mi c e. B r ai n, Be h a vior, a n d I m m u ni ty 9 8 , p p . 1 3 6-1 5 0.

Background Prevalence estimates of COVID‐19‐related posttraumatic stress disorder (PTSD) have ranged from 1% to over 60% in the general population. Individuals with lived experience of a psychiatric disorder may be particularly vulnerable to COVID‐19‐related PTSD but this has received inadequate attention. Methods Participants were 1571 adults with lived experience of psychiatric disorder who took part in a longitudinal study of mental health during the COVID‐19 pandemic. PTSD was assessed by the International Trauma Questionnaire (ITQ) anchored to the participant's most troubling COVID‐19‐related experiencevent. Factors hypothesised to be associated with traumatic stress symptoms were investigated by linear regression. Results 40.10% of participants perceived some aspect of the pandemic as traumatic. 5.28% reported an ICD‐11 PTSD qualifying COVID‐19 related traumatic exposure and 0.83% met criteria for probable ICD‐11 COVID‐19‐related PTSD. Traumatic stress symptoms were associated with younger age, lower income, lower social support, and financial worries, and lived experience of PTSD/complex PTSD. Depression and anxiety measured in June 2020 predicted traumatic stress symptoms at follow‐up approximately 20 weeks later in November 2020. Conclusions We did not find evidence of widespread COVID‐19‐related PTSD among individuals with lived experience of a psychiatric disorder. There is a need for future research to derive valid prevalence estimates of COVID‐19‐related PTSD.