TABLE 1.

Prevalence and characteristics of ME/CFS.

Variable	n	CFS	Non-CFS	Prevalence (%)	X 2	P
Gender
Male	992	67	925	6.75	0.96	0.33
Female	800	45	755	5.63
Age
<19	326	30	296	9.20	6.02	0.11
19–22	1,198	66	1,132	5.51
22–25	164	10	154	6.10
26–29	104	6	98	5.77
Grade
Fresh year	673	52	621	7.73	4.42	0.35
Sophomore year	626	33	593	5.27
Junior year	139	7	132	5.04
Senior year	137	9	128	6.57
Others	217	11	206	5.07
Major
Medical	715	41	674	5.73	3.8991	0.14
Science and engineering	875	52	823	5.94
Others	202	19	183	9.41