Table 2.

The likelihood of receiving at least one positive sample of a three-sample faecal immunochemical test (FIT), with different numbers of samples analysed, in patients with colorectal cancer or adenomas with high-grade dysplasia and 95% confidence intervals.

	Using all cases (n = 160)	Using only positive cases (n = 139)
One sample analysed	0.79 (0.72–0.85)	0.91 (0.85–0.95)
Two samples analysed	0.84 (0.78–0.89)	0.97 (0.93–0.99)
Three samples analysed	0.87 (0.81–0.91)	1.00 (0.98–1.00)