Table 1.
General characteristics of the subjects

Category		Frequency (person)	Rate (%)RateRate	Category		Frequency (person)	Rate (%)
Gender	Male	98	31.4	Education level	Elementary school graduate	4	1.3
	Female	214	68.6		Middle school graduate	9	2.9
Residence	Incheon	270	86.5		High school graduate	84	26.9
	Gyeonggi-do	29	9.3		College graduate	182	58.3
Seoul	10	3.2	Graduate school		31	9.9
Etc.	3	1.0	Etc.		2	0.7
Age	10대	2	0.7	Income	Less than 1 million won	13	4.2
	20대	50	16.0		More than 1 million won and less than 2 million won	42	13.4
	30대	77	24.7		More than 2 million won and less than 3 million won	63	20.2
	40대	82	26.3		More than 3 million won and less than 4 million won	86	27.6
	50대	70	22.4		More than 4 million won and less than 5 million won	49	15.7
	60대 이상	31	9.9		Over 5 million won	59	18.9