Table 2. Characteristics of participants (for variables‏ in the model) by gender .

Variables	Male, n=443		Female, n=461		Total
	Number	Percent	Number	Percent	Number	Percent
BMI (kg/m2)
Underweight	20	4.5	14	3.0	34	3.8
Normal	311	70.2	343	74.4	654	72.3
Overweight	83	18.7	77	16.7	160	17.7
Obese	29	6.6	27	5.9	56	6.2
Internet addiction (score)
≤50	390	88.0	399	86.6	789	87.3
50-69	43	9.7	51	11.1	94	10.4
>70	10	2.3	11	2.4	21	2.3
Sleep quality (score)
<5	353	79.7	360	78.1	713	78.9
≥5	90	20.3	101	21.9	191	21.1