Diagnostic value of occult fecal blood testing for colorectal cancer screening

Table 1 Diagnostic value of PRHA-FOBT (passive hemagglutination reaction fecal occult blood testing) by age group

Sex	n	Sensitivity (%)	Specificity (%)	J	PV (+)
Men	30177	43.5	95.9	0.39	0.81
Women	32434	40	95.7	0.36	0.56
Total	62611	41.9	95.8	0.38	0.68

Table 2 Diagnostic value of PRHA-FOBT (reversed passive hemagglutination reaction fecal occult blood testing) by age group

Age (yrs)	Sex	Case/mass	Sensitivity (%)	Specificity (%)	PV(+) (%)
30-39	Men	23/30177	43.5	95.9	0.81
	Women	20/32434	40	95.7	0.56
	Total	43/62611	41.9	95.8	0.68
40-49	Men	22/19026	40.9	95.9	1.15
	Women	18/20517	38.9	95.6	0.77
	Total	40/39543	40	95.8	0.94
50-59	Men	19/10891	47.4	95.9	1.96
	Women	15/12497	46.7	95.3	1.18
	Total	34/23388	47.1	95.6	1.52
≥ 60	Men	8/4856	50	95.2	1.68
	Women	9/6219	55.6	94.8	1.53
	Total	17/11075	52.9	95	1.6

Table 3 CIR1 and CIR3 (One-year cumulative incidence rate and three-year cumulative incidence rate) by sex and RPHA-FOBT (reversed passive hemagglutination reaction fecal occult blood testing) Results

Sex	FOBT (+)				FOBT (-)
	n	CIR1	CIR3	u1	n	CIR1	CIR3	u1
Men	1236	809.1	809.1	0	28941	44.9	148.6	4.01b
Women	1417	564.6	564.6	0	31017	38.7	112.3	3.35b
Total	2653	678.5	678.5	0	59958	41.7	130.1	5.55b

^bP < 0.01; ¹u = (|x1 - x2|)/( x1 + x2)^1/2.