Table 1. Description of samples.

		BD-I	BD-II	UD	P
Number		118	191	1178
Age		35.43	35.46	40.54	<0.01
Sex	Male	51	97	385	<0.01
Marriage state	Married	76	116	824	= 0.01
	Unmarried	37	68	288
	Divorced	5	7	47
	Loss	0	0	19
Job	Employed	68	110	617	>0.05
	Retired	8	26	195
	Unemployed	42	55	366
Education	Lower than senior high school	31	52	356	= 0.48
	Senior high school Equal to a	32	44	312
	Bachelor's degree	47	85	465
	Postgraduate	8	10	45