Table 4. Specificity and sensitivity of the risk score.

Score threshold	specificity	sensitivity	Positive predictive value	Negative predictivevalue	True positive	True negative	False negative	False positive
0	0.000	1.000	0.313		81	0	0	178
1	0.006	1.000	0.314	1.000	81	1	0	177
2	0.079	1.000	0.331	1.000	81	14	0	164
3	0.247	0.938	0.362	0.898	76	44	5	133
4	0.663	0.617	0.455	0.792	50	118	31	60
5	0.921	0.296	0.632	0.742	24	164	57	14
6	1.000	0.074	1.000	0.704	6	178	75	0
7	1.000	0.012	1.000	0.690	1	178	80	0
8	1.000	0.012	1.000	0.690	1	178	80	0
9	1.000	0.000		0.687	0	178	81	0
10	1.000	0.000		0.687	0	178	81	0