Screen time duration and timing: effects on obesity, physical activity, dry eyes, and learning ability in elementary school children

Table 8 Results of the combination of ST duration and timing

	BMI percentiles	Rohrer index	Weekly physical activities^b	Dry eyes	Class	Performance
	OR^a	OR^a	OR^a	OR^a	OR^a	OR^a
	95%Cl	95%Cl	95%Cl	95%Cl	95%Cl	95%Cl
G1^c × G2^c	0.73	0.64	1.09	1.04	1.59	1.85^**
G1^c × G2^c	0.47–1.12	0.40–1.05	0.81–1.48	0.72–1.49	0.88–2.87	1.26–2.72
G3^C × G4^C	0.72^**	0.76^*	1.09	1.36^***	1.37	1.53^***
G3^C × G4^C	0.57–0.90	0.60–0.97	0.95–1.25	1.14–1.63	0.97–1.93	1.26–1.85
G5^C × G6^C	1.05	0.73	0.99	1.38^*	1.41	1.42^*
G5^C × G6^C	0.71–1.56	0.49–1.09	0.81–1.20	1.08–1.77	0.78–2.56	1.05–1.91

^***p < 0.001, ^**p < 0.01, ^*p < 0.05
^aOR odds ratio, 95% CI 95% confidence interval
^bThe median number of physical activities per week was divided into two
^cDivided into G1 to G6 based on the combination of ST duration and timing (Please refer to Table 2)

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