Table 2. The correlation between subjective health conditions and factors.

		Subjective health conditions
		E4		M1
		t	p-value	t	p-value
Living time	Sleep time	0.035	0.086	0.026	0.182
	Study time	0.040*	0.049	0.060**	0.003
	Leisure time	0.059**	0.004	0.059**	0.003
Emotion	Happiness	0.284**	0.001	0.330**	0.001
	Self-esteem	0.347**	0.001	0.358**	0.001
	Emotional problem	-0.330**	0.001	-0.323**	0.001
Capabilities	Cooperative attitude	0.259	0.001	0.228**	0.001
	Grit	0.272**	0.001	0.276**	0.001
Health	Life satisfaction	0.300**	0.001	0.312**	0.001
	Exercise time	0.198**	0.001	0.197**	0.001
	Number of breakfasts	0.048*	0.020	0.086**	0.001
	BMI	-0.045*	0.026	-0.044*	0.027
	Quality of sleep	0.207**	0.001	0.193**	0.001
Media	Smartphone use	0.021	0.314	0.033	0.101
	Smartphone dependence	-0.203**	0.001	-0.182**	0.001
School	Satisfaction of school life	0.185**	0.001	0.232**	0.001
	Friendly relationship	0.251**	0.001	0.293**	0.001
	Teacher relationship	0.222**	0.001	0.221**	0.001
Home	Time spent with parents	0.036	0.075	0.073**	0.001
	Parenting attitude	0.282**	0.001	0.040	0.768

*p<0.05

**p<0.01