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. 2021 Aug 18;12:702092. doi: 10.3389/fpsyt.2021.702092

Table 1.

Demographic and clinical characteristics: sub-grouped for grade.

Variable Grade ( N = 454) Stats
1st ( N = 123) 2nd ( N = 110) 3rd ( N = 121) 4th ( N = 100) χ2/F df P Post hoc
Demographic: sex, men/women 80 43 70 40 75 46 64 36 0.25 3 0.969 -
Use of personal time during COVID-19, YES/NO
Sleep 63 60 60 50 82 49 46 54 11.96 3 0.008 3rd > 4th
Computer game 20 103 33 77 31 90 25 75 6.44 3 0.092 -
Reading 9 114 13 97 14 107 9 91 1.84 3 0.606 -
Study 81 42 46 64 58 63 34 66 25.23 3 <0.001 1st > 2nd = 3rd = 4th
Exercise 26 97 42 68 49 72 28 72 13.36 3 0.004 1st <2nd = 3rd
Spend time with family and friends 40 83 38 72 53 68 35 65 3.90 3 0.273 -
Difficulty of online class attendance during COVID-19, YES/NO
Maintaining regular daily routine 40 83 32 78 21 100 19 81 10.45 3 0.015 1st > 3rd
Insufficient interaction for understanding 31 92 15 95 23 98 28 72 8.01 3 0.046 NS
restriction of on-site social activities 65 58 62 48 60 61 46 54 2.51 3 0.473 -
Perceived threat of infection during COVID-19, Mean/SD, [−2 = strongly disagree; −1 = disagree; 0 = neither agree nor disagree; 1 = agree;
2 = strongly agree]
Fear of my getting COVID-19 0.5 1.1 0.5 1.2 0.2 1.2 0.2 1.2 19.22 3 <0.001 1st <4th, 2nd <4th
Fear of transmitting COVID-19 to family 0.2 1.3 0.2 1.2 0.1 1.4 0.5 1.2 20.89 3 <0.001 1st <4th, 2nd <4th, 3rd <4th
Fear of transmitting COVID-19 to colleague 0.2 1.2 0.2 1.2 0.1 1.3 0.6 1.3 28.52 3 <0.001 1st <4th, 2nd <4th, 3rd <4th
Proactive coping for COVID-19, Mean/SD, [−2 = strongly disagree; −1 = disagree; 0 = neither agree nor disagree; 1 = agree; 2 = strongly agree]
My keeping social distance 1.1 0.7 0.9 0.9 0.6 1.1 0.9 1.0 16.16 3 0.001 1st > 3rd
My keeping personal hygiene 1.3 0.8 1.2 0.7 1.1 0.8 1.2 0.8 5.96 3 0.113 -
Feeling proud for medical staff at frontline 1.7 0.6 1.5 0.8 1.3 0.9 1.3 0.9 21.69 3 <0.001 1st > 3rd, 1st > 4th
My willing to future volunteer at frontline 0.9 0.9 1.0 0.9 0.6 1.1 0.6 1.0 11.91 3 0.008 NS
Perceived stress: PSS total score, Mean/SD 21.0 7.6 19.6 6.2 17.9 6.5 16.6 7.0 8.92 3 <0.001 1st > 3rd, 1st > 4th, 2nd > 4th
Anxiety: GAD-7: total score, Mean/SD 6.6 5.1 5.5 4.3 5.0 4.9 5.0 4.9 3.10 3 0.027 1st > 3rd
Depressive mood: PHQ-9: total score, Mean/SD 5.7 4.6 4.3 4.5 4.0 4.6 3.5 4.6 4.89 3 0.002 1st > 3rd, 1st > 4th
School dropout intention during COVID-19 65 58 51 59 33 88 14 86 45.34 3 <0.001 1st = 2nd > 3rd = 4th