Table 6. Correlations between subscales of MEUS.

	Factor 1(withdrawal and health problem)	Factor 2(social comfort)	Factor 3(time management and performance)
Factor 1	1	–	–
Factor 2	0.328**	1	–
Factor 3	0.473**	0.211**	1
The total score of MEUS	0.784**	0.704**	0.678**

^** P<.05.