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Fig. 3 | BMC Psychiatry

Fig. 3

From: The prevalence and risk factors for depressive symptoms in frontline nurses under COVID-19 pandemic based on a large cross-sectional study using the propensity score-matched method

Fig. 3

ROC curve and cutoff value for continuous independent risk factors of depressive symptoms before and after PSM. a PSQI scores of depressive symptoms before PSM. b Optimism of PsyCap scores of depressive symptoms before PSM. c PSQI scores of depressive symptoms after PSM. d Optimism of PsyCap scores of depressive symptoms after PSM. Abbreviations: ROC, receiver operating characteristic curve; AUC, area under the curve; PSQI, Pittsburgh sleep quality index; PsyCap, Psychological Capital; PSM, propensity score matching

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