Table 2

Expected total width of the 95% CI for the sensitivity, given the sensitivity of test (rows) and the number of ‘positive’ samples (columns)

		Number of positive samples
		50	100	200	400	600
Assumed sensitivity of test	0.85	0.22	0.15	0.10	0.07	0.06
	0.9	0.19	0.13	0.09	0.06	0.06
	0.95	0.14	0.10	0.07	0.05	0.04
	0.99	0.09	0.06	0.04	0.02	0.02