Table 2.

K-index measurements across laboratories using Binding Site instruments and assays (B), Siemens instruments and assays (S) or a Siemens instrument coupled with a Binding Site assay (mixed). Discordant results, considering a cut-off for a positive K-index of 5.8, in bold.

Sample	B1	B1	B3	B4	mixed	S1	S2	S3
1	197.0	252.1	108.3	205.3	479.5	170.5	197.9	185.6
2	6.9	6.4	4.6	11.8	10.5	5.8	6.0	6.7
3	1.6	2.5	2.0	2.6	4.8	2.3	1.3	1.4
4	7.0	8.6	5.0	14.1	18.4	5.1	6.3	6.4
5	19.3	24.3	16.0	15.5	57.0	14.4	18.0	14.8
6	3.4	3.1	2.4	3.2	3.6	2.2	2.7	3.4
7	68.5	51.4	42.3	36.5	103.8	36.5	42.8	42.1
8	18.2	24.6	21.1	21.3	42.3	18.8	17.5	15.4
9	19.2	17.6	11.5	10.1	22.7	12.2	15.6	11.1
10	1.8	2.9	3.2	0.4	9.8	3.2	2.5	2.3
11	7.7	10.8	9.6	11.5	19.3	10.3	7.8	10.2
12	27.1	28.5	18.6	20.0	86.5	19.3	23.1	20.1
13	1.1	1.2	1.2	1.2	1.2	1.0	1.0	0.9
14	4.8	8.2	5.5	7.0	14.2	7.5	5.5	6.1
15	7.0	12.4	9.5	9.7	23.0	13.5	8.4	8.7