Indian Journal of Psychiatry · 2020 · 353 citations · 22 references
The COVID-19 lockdown is associated with changes in sleep schedule and in the quantity and quality of night-time sleep. Although these changes are associated with elevated rates of emotional symptoms, it is unclear from these cross-sectional results, whether sleep deterioration produces psychological distress, or vice versa.
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An Ultra-Brief Screening Scale for Anxiety and Depression: The PHQ-4
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Self-Reported and Measured Sleep Duration
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The two‐process model of sleep regulation: a reappraisal
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