Table 4.

Performance characteristics of the score in the validation set (N=17 939)

Risk score	Persons, n	Advanced neoplasi*
		N	Per cent	Sensitivity, %	Specificity, %	Positive predictive value, %	Negative predictive value, %
0	152	2	1.32	100.00	0.00	7.08	–
1	2259	95	4.21	99.84	0.90	7.13	98.68
2	3608	165	4.57	92.36	13.88	7.55	95.98
3	4626	284	6.14	79.37	34.54	8.46	95.65
4	3745	290	7.74	57.01	60.59	9.93	94.87
5	2432	274	11.27	34.17	81.31	12.23	94.19
6	981	134	13.66	12.60	94.26	14.32	93.40
7 and 8†	136	26	19.12	2.05	99.34	19.12	93.01
Total	17 939	1270	7.08

*Advanced neoplasia includes advanced adenomas and cancers.

†Due to small sample risk scores 7 and 8 are presented in one row.