Table 4. Sensitivities and specificities of questionnaire and FIT testing.

Colonoscopy	Questionnaire results			FIT results			FIT & questionnaire
	Positive	Negative		Positive	Negative		Positive	Negative
Positive	156	114		115	127		248	22
Negative	237	116		101	208		322	31
Sensitivities	0.578			0.475			0.919
Specificities	0.329			0.673			0.088
NPVs	0.504			0.621			0.585
PPVs	0.397			0.532			0.435

FIT, fecal immunological test; NPV, negative predictive value; PPV, positive predictive value.