A year in review: sleep dysfunction and psychological distress in healthcare workers during the COVID-19 pandemic

The Covid-19 outbreak has taken a substantial toll on the mental and physical wellbeing of healthcare workers (HCWs), impacting healthcare systems at a global scale. One year into the pandemic, the need to establish the prevalence of sleep dysfunction and psychological distress in the face of COVID-19, identify risk and protective factors and explore effective countermeasures remains of critical importance. Despite implicit limitations relating to the quality of available studies, a plethora of evidence to-date suggests that a considerable proportion of HCWs experience significant sleep disturbances (estimated to afflict every two in five HCWs) as well as mood symptoms (with more than one in five reporting high levels of depression or anxiety). Younger age, female gender, frontline status, fear or risk of infection, occupation, current or past mental health concerns, and a lower level of social support were all associated with a greater risk of disturbed sleep and adverse psychological outcomes. Furthermore, we discuss the link between sleep deprivation, susceptibility to viral infections and psychosocial wellbeing, in relevance to COVID-19 and summarize the existing evidence regarding the presence and predictors of traumatic stress/PTSD and burnout in HCWs. Finally, we highlight the role of resilience and tailored interventions in order to mitigate vulnerability and prevent long-term physical and psychological implications. Indeed, promoting psychological resilience through an enhanced social support network has proven crucial for HCWs in coping under these strenuous circumstances. Future research should aim to provide high quality information on the long-term consequences and the effectiveness of applied interventions.