Table I. Sample information for the validation set.

Characteristics	CCP+	CCP-	HC	p value
No. subjects	50	50	50
Mean age	52.22 (18–82)	53.64 (19–89)	52.54 (19–81)	0.87 (one-way ANOVA)
Gender
Male	7	7	7	1 (Chi-square test)
Female	43	43	43
No data	0	0	0
Race
White	49	48	50	0.77 (Fisher's exact test)
Asian	0	0	0
Indian	0	1	0
other	1	0	0
No data	0	1	0