Table II. The characteristics of sera samples used in ELISA for validation the candidate biomarkers.

Type	No.	Ages		p*	Gender		p
		Mean	S.D.		Male	Female
Healthy	35	33.86	17.95		8	27
PI	58	38.58	18.74	0.801	34	24	0.339
PII	6	34.33	13.22	ND	2	4	ND
PIII	3	33.00	16.46	ND	1	2	ND
OP1	5	42.20	10.40	ND	4	1	ND
OP2	6	57.80	8.66	ND	5	1	ND
OP3	5	8.40	7.30	ND	2	3	ND

* F-test.