Table 3 Independent correlates of depression and anxiety of the whole sample (n = 13,440).

From: Depression, anxiety and associated factors among Chinese adolescents during the COVID-19 outbreak: a comparison of two cross-sectional studies

Variables Depression Anxiety
P value OR 95% CI for OR P value OR 95% CI for OR
Lower Upper Lower Upper
Second survey completion <0.001 1.47 1.34 1.61 <0.001 1.64 1.48 1.81
Female <0.001 1.21 1.12 1.31 <0.001 1.23 1.13 1.34
Senior secondary school <0.001 1.41 1.29 1.54 <0.001 1.27 1.15 1.41
School type
Provincial key schools Ref     Ref    
Municipal key schools 0.551 0.95 0.80 1.13 0.064 0.84 0.69 1.01
Ordinary schools 0.336 1.08 0.92 1.26 0.003 0.78 0.66 0.92
Vocational schools 0.015 1.25 1.04 1.51 0.327 0.90 0.74 1.11
Major class 0.050 0.92 0.84 1.00 0.265 1.06 0.96 1.17
Sleep duration/day
<6 h Ref     Ref    
6–8 h <0.001 0.45 0.37 0.53 <0.001 0.47 0.40 0.55
>8 h <0.001 0.32 0.27 0.38 <0.001 0.34 0.28 0.40
Study duration/day
<4 h Ref     Ref    
4–8 h 0.023 0.87 0.78 0.98 0.098 0.89 0.78 1.02
>8 h 0.758 1.02 0.90 1.16 0.096 1.13 0.98 1.31
Exercise duration/day
<30 min Ref     Ref    
30–60 min <0.001 0.64 0.60 0.70 <0.001 0.73 0.67 0.80
>60 min <0.001 0.67 0.59 0.77 0.025 0.84 0.73 0.98
Change of study efficiency
Lower than before Ref     Ref    
About the same <0.001 0.65 0.60 0.71 <0.001 0.72 0.65 0.79
Higher than before <0.001 0.64 0.56 0.74 0.014 0.81 0.69 0.96
No. of COVID-19 cases at provincial level
10–99 Ref     Ref    
100–999 0.159 0.62 0.32 1.21 0.008 0.41 0.22 0.80
1000–9999 0.028 0.47 0.24 0.92 0.001 0.31 0.16 0.60
>10,000 0.135 0.59 0.30 1.18 0.013 0.42 0.21 0.83
Participating in distance learning <0.001 0.68 0.56 0.81 0.637 0.95 0.77 1.18
Concerned about entering a higher grade <0.001 1.75 1.62 1.89 <0.001 1.74 1.59 1.91
  1. Due to Collinearity between age and grade, age was not entered in the multivariable logistic regression analysis.
  2. Bolded values: P < 0.05.
  3. CI confidential Interval, OR odds ratio.