Mental health disturbance in preclinical medical students and its association with screen time, sleep quality, and depression during the COVID-19 pandemic

Table 2 The Dunn’s post hoc analysis for depression (PHQ-9)

Current Mental Health	Mean Rank Difference	Std. Error	Std. Deviation of Mean Rank	Sig.	Adj. Sig.
WCMH-PD	-214.827	28.819	-7.454	0.000	0.000
WCMH-SD	-310.432	26.462	-11.731	0.000	0.000
WCMH-Both	-437.012	24.183	-18.071	0.000	0.000
PD-SD	-95.604	34.598	-2.763	0.006	0.034
PD-Both	-222.185	32.888	-6.756	0.000	0.000
SD-Both	-126.581	30.844	-4.104	0.000	0.000

WCMH = without current mental health disturbances, PD = psychological distress, SD = social dysfunction, Both = with psychological distress and social dysfunction. Each row tests the null hypothesis that the group distributions are equivalent. Asymptotic significance (2-sided tests) is displayed. The significance level is set at 0.05. Significance values were adjusted by Bonferroni correction for multiple tests

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