Table 1.

Multiple logistic regression of associated factors with anxiety in adolescents during the outbreak of COVID‐19

			95%CI for OR
Variables	P	OR	Lower	Upper
Female sex	<0.001	1.298	1.164	1.448
Senior secondary school	<0.001	1.475	1.317	1.653
Living area at provincial level (No. of infected patients)
10–99	Ref.
100–999	0.005	0.830	0.729	0.944
1000–9999	<0.001	0.687	0.578	0.817
≥10 000	0.956	0.993	0.775	1.273
Acquaintance got infected	0.122	1.232	0.946	1.606
Being concerned about COVID‐19	0.008	0.840	0.739	0.956
Sleep duration/day
6–8 h	Ref.
<6 h	<0.001	2.270	1.844	2.795
>8 h	<0.001	0.756	0.673	0.850
Exercise duration/day
<30 min	Ref.
30–60 min	<0.001	0.715	0.638	0.802
>60 min	0.215	0.886	0.732	1.073
Study duration/day ≥4 h	0.398	0.939	0.811	1.807
Participation in distance learning	0.646	0.951	0.767	1.179
Being concerned about graduation	<0.001	1.752	1.575	1.950
Quantity of homework
About the same	Ref.
Lower than before	0.285	1.073	0.943	1.220
Higher than before	<0.001	1.916	1.664	2.207

Due to collinearity between age and grade, age group was not entered in the multiple logistic regression analysis.

Bolded values, P < 0.05.

CI, confidential interval; OR, odds ratio.