TABLE 3.

Realized Results for Trichotomization, With Test Scores 22 to 25 Considered as Uncertain

	Prevalence	N0	N1	Sp	Se	NPV	PPV
1	0.216	91	25	0.725	0.600	0.957	0.938
2	0.223	94	27	0.628	0.444	0.967	0.545
3	0.283	198	78	0.717	0.692	0.993	0.885
4	0.293	256	106	0.656	0.623	0.908	0.868
5	0.298	139	59	0.748	0.508	0.929	0.811
6	0.325	129	62	0.721	0.581	0.912	0.923
7	0.330	77	38	0.636	0.632	0.891	0.857
8	0.364	49	28	0.980	0.286	0.814	1.000
9	0.369	123	72	0.504	0.694	0.984	0.735
10	0.371	107	63	0.701	0.603	0.938	0.927
11	0.373	151	90	0.543	0.589	0.891	0.736
12	0.375	70	42	0.729	0.357	0.836	0.882
13	0.429	20	15	0.400	0.867	1.000	0.684
14	0.450	105	86	0.505	0.570	0.898	0.790
15	0.465	76	66	0.553	0.667	0.933	0.936
16	0.478	93	85	0.570	0.659	0.898	0.949
17	0.543	37	44	0.838	0.341	0.738	1.000
18	0.561	43	55	0.884	0.582	0.826	1.000
19	0.620	68	111	0.574	0.766	0.907	0.955
20	0.620	30	49	0.767	0.653	0.767	0.970
21	0.622	96	158	0.615	0.715	0.819	0.904
22	0.635	38	66	0.737	0.712	0.824	1.000
23	0.733	40	110	0.800	0.645	0.744	0.986
24	0.737	31	87	0.613	0.494	0.633	0.977
25	0.762	35	112	0.743	0.741	0.963	0.954
26	0.765	43	140	0.767	0.436	0.541	0.968
27	0.821	63	288	0.873	0.597	0.611	0.983
28	0.825	7	33	0.857	0.364	0.500	1.000
29	0.849	21	118	0.429	0.508	0.346	0.984
30	0.870	49	327	0.878	0.722	0.632	1.000

N₀, N₁: sizes of the samples of patients without and with CI.

NPV indicates negative predictive value; PPV, positive predictive value; Se, sensitivity; Sp, specificity.