Table 3.

Logistic regression analysis of risk factors of CVS among the pupils.

Factors	Logistic Regression Model
	p-Value	$\mathit{O}\mathit{R}$	$95\%\mathbf{C}.\mathbf{I}.\mathit{O}\mathit{R}$
			Lower	Upper
Gender
Male	Ref	1
Female	0.038	1.5	1.0	2.3
Age groups
13 to 15 years	Ref	1
16 to 17 years	0.003	2.7	1.4	5.2
6 to 12 years	0.009	2.3	1.2	4.2
School Level
Primary	Ref	1
Intermediate	0.006	2.0	1.2	3.3
High School	0.042	1.7	1.0	2.8
Experienced symptoms before COVID
No	Ref	1
Yes	<0.001	3.6	2.4	5.5
The severity of symptoms increased with COVID
No	Ref	1
Yes	<0.001	7.8	4.9	12.4