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. 2024 Jun 25;19(6):e0304338. doi: 10.1371/journal.pone.0304338

Table 3. Summary of results of bivariate analysis of study variables with three Depression Anxiety Stress Scale (DASS-21) sub-scale scores.

Study variable
Depression Anxiety Stress
Agea 2.07 (0.04) 1.58 (0.1) 1.20 (0.3)
Genderb 2.19 (0.14) 0.03 (0.8) 0.34 (0.5)
Study yearb 16.39 (0.001) 13.60 (<0.001) 3.77 (0.05)
Mother’s educationb 0.96 (0.3) 1.19 (0.2) 0.32 (0.5)
Father’s educationb 0.024 (0.8) 0.28 (0.5) 1.49 (0.2)
Household incomeb 0.43 (0.8) 0.71 (0.7) 2.18 (0.13)
Travelling from homeb 0.022 (0.8) 2.49 (0.1) 1.70 (0.1)
PSQI scorea -7.08 (<0.001) -6.63 (<0.001) -5.19 (<0.001)
Hobbies/ sports activitiesc 18301.00 (0.08) 18998.00 (0.02) 11329.00 (0.2)
Mindfulness activitiesc 16928.00 (0.007) 18793.00 (0.03) 10775.00 (0.09)
Social media usagec 17608.00 (0.03) 19453.00 (0.09) 9798.50 (0.004)
Contact with friendsc 17289.00 (0.01) 17979.50 (0.004) 12183–50 (0.9)
Contact with familyc 17169.50 (0.008) 17204.50 (<0.001) 10643.00 (0.05)
Romantic relationshipsc (Yes) 1.57 (0.4) 1.76 (0.4) 0.704 (0.7)

a Independent t-test, One-way ANOVA

b Chi-square test

c Mann-Whitney U test.

Abbreviations: PSQI-Pittsburgh Sleep Quality Index.

All three domains of DASS-21 were dichotomized to moderate/severe vs normal/mild.