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. 2021 Jun 11;84:289–293. doi: 10.1016/j.sleep.2021.06.007

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Fig. 1 — Cross-lagged model between sleep duration and depressive symptoms. Note: The two-way arrow in the chart indicates the result of correlation analysis, with the data of correlation coefficient; the one-way arrow indicates the result of path analysis, with the data of standardized regression coefficient (β). ∗∗∗: P < 0.001, ∗∗: P < 0.01, ∗: P < 0.05. Depression W1: depressive symptoms before the COVID-19 pandemic; Depression W2: depressive symptoms during the COVID-19 pandemic; Sleep W1: sleep duration before the COVID-19 pandemic; Sleep W2: sleep duration during the COVID-19 pandemic.