Table 2.
Mann-Whitney U tests and z scores of factors affecting students’ mental health issues as the grouping variable.
| Variable (factor) | Mann-Whitney U | Mann-Whitney z | P value |
| Gender (X8) | 243138.00 | –1.241 | .22 |
| Age (X1) | 241098.00 | –2.015 | .04 |
| Only child (X11) | 249085.00 | –0.508 | .61 |
| Ethnicity (X13) | 252327.50 | –0.176 | .86 |
| Place of residence (X14) | 252570.50 | –0.097 | .92 |
| Region (X10) | 252391.50 | –0.550 | .58 |
| Joining in volunteer work (X9) | 249072.50 | –0.818 | .41 |
| Contact history of similar infectious disease (X2) | 247191.00 | –3.646 | <.001 |
| Past medical history (X3) | 233145.00 | –5.787 | <.001 |
| Compulsive behaviors (X4) | 200731.00 | –9.003 | <.001 |
| Regularity of daily life (X5) | 179774.00 | –8.774 | <.001 |
| Exercise (X6) | 192609.00 | –7.481 | <.001 |
| Concern about COVID-19 (X7) | 230177.50 | –2.747 | .006 |
| Student type (X12) | 250828.00 | –0.349 | .73 |