Table 2.

Association between problematic Internet use and oral health behaviors and oral health status

Dependent variable	Problematic Internet users after adjustment*, %	Usual Internet users after adjustment†, %	OR (95% CI)	AOR (95% CI)
Toothbrushing frequency
Three or more times a day	75.39	85.49	0.52 (0.49-0.55)	0.59 (0.56-0.63)
Twice a day or less	24.61	14.51	Ref	Ref
Toothbrushing at school after lunch
Always or most	35.73	41.74	0.78 (0.72-0.83)	0.89 (0.83-0.94)
Sometimes or never	64.27	58.26	Ref	Ref
Dental check-up during the past 12 months
Yes	62.90	65.24	0.90 (0.86-0.95)	0.98 (0.93-1.03)
No	37.10	34.76	Ref	Ref
Self-perceived oral health
Unhealthy	35.30	24.10	1.72 (1.62-1.82)	1.63 (1.54-1.72)
Fair to healthy	64.70	75.90	Ref	Ref
Oral symptom experience
Yes	75.90	63.93	1.78 (1.67-1.89)	1.75 (1.65-1.86)
No	24.10	36.07	Ref	Ref

AOR, adjusted for sex, school grade, residential type, alcohol, smoking, and substance use, and the level of perceived stress. Independent variable: problematic Internet use, dependent variable: oral health behaviors.

^*sample size=11644, weighted=614492,

^†sample size=61594, weighted=3302749. AOR: adjusted odds ratio, CI: confidence interval, OR: odds ratio