Table 2.
Independent correlates of anxiety in adolescents with depression by multivariate logistical regression analysis.
| Variables | P | OR | 95% CI for OR | |
| Lower | Upper | |||
| Model 1 | ||||
| Female | 0.008 | 1.20 | 1.05 | 1.38 |
| Senior secondary school | 0.004 | 1.22 | 1.07 | 1.40 |
| Model 2 | ||||
| Female | 0.01 | 1.20 | 1.04 | 1.38 |
| Senior secondary school | 0.008 | 1.21 | 1.05 | 1.39 |
| Parents as frontline worker | 0.12 | 1.21 | 0.95 | 1.53 |
| Concern about graduation | 0.001 | 1.27 | 1.11 | 1.46 |
| Number of confirmed COVID-19 cases at provincial level | ||||
| 10-99 | – | 1 | – | – |
| 100-999 | <0.001 | 0.67 | 0.56 | 0.79 |
| 1,000-9,999 | <0.001 | 0.65 | 0.52 | 0.81 |
| >10,000 | 0.21 | 0.82 | 0.59 | 1.12 |
| Model 3 | ||||
| Female | 0.006 | 1.21 | 1.06 | 1.39 |
| Senior secondary school | 0.04 | 1.16 | 1.01 | 1.33 |
| Sleep duration/day | ||||
| 6-8h | – | 1 | – | – |
| <6h | <0.001 | 1.91 | 1.47 | 2.48 |
| >8h | 0.05 | 0.86 | 0.74 | 1.00 |
| Study duration/day | ||||
| 4-8h | – | 1 | – | – |
| <4h | 0.79 | 1.03 | 0.85 | 1.23 |
| >8h | 0.03 | 1.19 | 1.01 | 1.39 |
| Quantity of homework | ||||
| About the same | – | 1 | – | – |
| Lower than before | 0.95 | 1.01 | 0.86 | 1.18 |
| Higher than before | <0.001 | 1.72 | 1.43 | 2.06 |
| Model 4 | ||||
| Female | 0.009 | 1.20 | 1.05 | 1.38 |
| Senior secondary school | 0.03 | 1.18 | 1.02 | 1.36 |
| Sleep duration/day | ||||
| 6-8h | – | 1 | – | – |
| <6h | <0.001 | 1.80 | 1.38 | 2.34 |
| >8h | 0.13 | 0.89 | 0.77 | 1.04 |
| Study duration/day | ||||
| 4-8h | – | 1 | – | – |
| <4h | 0.56 | 1.06 | 0.88 | 1.27 |
| >8h | 0.02 | 1.21 | 1.03 | 1.42 |
| Quantity of homework | ||||
| About the same | – | 1 | – | – |
| Lower than before | 0.80 | 1.02 | 0.87 | 1.20 |
| Higher than before | <0.001 | 1.68 | 1.40 | 2.02 |
| Parents as frontline worker | 0.32 | 1.13 | 0.89 | 1.44 |
| Concern about graduation | 0.002 | 1.25 | 1.09 | 1.43 |
| Number of confirmed COVID-19 cases at provincial level | ||||
| 10-99 | – | 1 | – | – |
| 100-999 | <0.001 | 0.70 | 0.59 | 0.83 |
| 1,000-9,999 | 0.001 | 0.69 | 0.55 | 0.87 |
| >10,000 | 0.25 | 0.83 | 0.60 | 1.14 |
Note: Bolded P-values: <0.05; COVID-19: Coronavirus Disease 2019; OR: odds ratio; CI: confidence interval. Multiple logistic regression models with the “enter” method were used. Model 1 was gender-adjusted and grade-adjusted. Model 2 was adjusted for gender, grade, parents as frontline workers, concern about graduation, and residence. Model 3 was adjusted for gender, age, daily sleep duration, daily study duration, and quantity of homework. Model 4 was adjusted for all factors mentioned above. Due to the collinearities, age and geographical regions were not included in the multiple logistic regressions.