Table 1.

Age and gender distribution of subjects and controls

	Subjects		Controls
	Frequency	Percent	Frequency	Percent
Age
18–23	182	66.9	161	59.2
24–29	76	27.9	89	32.7
30–35	14	5.2	22	8.1
Total	272	100	272	100
Gender
Male	137	50.4	143	52.6
Female	135	49.6	129	47.4
Total	272	100	272	100