Table 2.

Parameters Referring to Clamp Quality and Utility

Clamp no.	Trueness of BG measurement (mg/dl)	CV at target level (%)	MARD at target level (%)	Mean diff. device vs target level (mg/dl)	Utility (%)
1	2.3	3.7	5.2	0.4	97.0
2	9.3	7.0	13.6	0.4	96.9
3	8.8	5.7	8.6	0.0	84.3
4	0.9	4.2	5.7	0.3	99.7
5	3.6	3.5	2.2	0.4	98.0
6	−0.1	4.7	4.5	0.7	96.7
7	−0.9	11.0	10.9	0.0	98.8
8	−4.3	4.3	6.6	1.2	100.0
9	4.7	5.1	6.7	1.0	95.0
10	2.4	9.7	8.9	0.1	98.7
11	0.8	5.6	4.6	1.8	90.3
12	1.0	2.6	5.4	0.1	98.5
13	0.9	6.2	4.5	2.5	98.4
14	0.7	4.9	4.5	0.3	96.6
15	−0.2	7.7	5.6	2.1	96.8
16	—	—	—	—	—
17	2.4	5.3	5.9	0.2	98.0
18	0.4	9.4	7.5	2.0	94.5
19	0.0	4.2	3.8	0.8	99.2
20	2.1	5.2	5.5	0.3	95.8
21	0.2	8.4	3.8	8.6	91.3
22	1.2	5.5	4.0	1.5	93.7
23	1.6	3.7	4.3	1.1	97.9
24	1.9	5.4	4.6	0.3	91.9
25	−0.1	4.3	3.3	1.4	98.3
26	0.4	8.5	4.4	3.3	83.5
27	1.7	3.0	3.3	0.5	94.5
28	1.3	2.3	4.9	0.4	97.9
29	2.9	6.1	4.5	0.1	94.9
30	−1.1	7.6	6.4	1.8	88.5
31	—	—	—	—	—
32	1.2	7.8	3.4	3.6	98.6
33	−1.1	6.2	4.9	2.5	89.5
34	3.3	6.6	4.9	1.9	94.7
35	−1.0	4.5	3.6	0.6	98.9
36	−1.5	3.8	3.2	1.3	91.2
37	−0.3	4.9	7.5	0.5	97.9
38	−0.3	3.5	3.6	0.9	98.6
39	−1.4	2.4	2.3	0.3	95.8
Mean	1.2	5.5	5.3	1.2	95.4
SD	2.5	2.1	2.3	1.6	4.1
Median	0.9	5.2	4.6	0.7	96.8
Interquartile range	2.3	-2.4	2.1	1.5	3.9

Trueness: mean (device vs ref. method); CV: 100 × (SD device/mean device); MARD: 100 × ([ref. meth. – device]/ref. meth.); utility: 100 × (operational time/total time).