The impact of the initial and 2nd national COVID-19 lockdown on mental health in young people with and without pre-existing depressive symptoms
Background The evidence on mental well-being and loneliness among young people during the initial lockdown is mixed, and little is known about the long-lasting impact of the sequential lockdowns. We examine changes in young peoples mental health from before to during the initial and second more prolonged lockdown, and whether women and those with pre-existing depressive symptoms were disproportionally impacted. Methods Participants reported on mental health indicators in an ongoing 18-year data collection in the Danish National Birth Cohort and in a COVID-19 survey, including 8 data points: 7 in the initial lockdown, and 1 year post. Changes in quality of life (QoL), mental well-being, and loneliness were estimated with random effect linear regressions on longitudinal data (N=32,985), and linear regressions on repeated cross-sections (N=28,579). Findings Interim deterioration in mental well-being and loneliness was observed during the initial lockdown, and only in those without pre-existing depressive symptoms. During the second lockdown, a modest deterioration was again observed for mental well-being and loneliness. QoL likewise only declined among those without pre-existing symptoms, where women showed a greater decline than men. QoL did not normalise during the initial lockdown and remained at lower levels during the second lockdown. These findings were not replicated in the repeated cross-sections. Interpretation Except for an interim decrease in mental health during lockdown, and only in those without pre-existing depressive symptoms, this studys findings do not suggest a substantial detrimental impact of the lockdowns. Potential methodological differences in-between studies are a possible explanation for the mixed evidence. Funding The Velux Foundation