TABLE 4.

Results of the collaborative study validating the reproducibility of the analytical accuracy using primer set 139-141

Laboratory no.	Inclusivity (%)	Exclusivity (%)	Positive predictivity (%)	Negative predictivity (%)	Analytical accuracy (%)	Kappa indexa
1	100	100	100	100	100	1.000
2	94	100	100	92	96	0.926
3	96	97	98	94	96	0.927
4	100	100	100	100	100	1.000
4	98	92	94	97	95	0.903
6b	94	67	65	94	77	0.561
7	100	100	100	100	100	1.000
8	100	100	100	100	100	1.000
9	100	100	100	100	100	1.000
10	91	100	100	88	95	0.889
11	100	100	100	100	100	1.000
12	96	100	100	94	98	0.951
13	94	92	94	92	93	0.854
14	100	100	100	100	100	1.000
15	87	100	100	81	92	0.826
16	100	100	100	100	100	1.000
All	97	96	97	96	96	0.926
All but laboratory 6	97	99	99	96	98	0.952

^aKappa values of <0.01 indicate no concordance, 0.1 to 0.4 indicate weak concordance, 0.41 to 0.60 indicate clear concordance, 0.61 to 0.80 indicate strong concordance, and 0.81 to 1.00 indicate nearly complete concordance.

^bLaboratory 6 was excluded from the final statistical analysis due to a markedly lower Kappa index compared with those of the other laboratories.