Analytical Validation of a New Enzymatic and Automatable Method for d-Xylose Measurement in Human Urine Samples

Table 2

Results of the cross-validation experiment in each automated analyzer.

	Cobas c502; (Roche)	ILab 600; (Werfen)	Dimension Vista; 1500 (Siemens)
Urine LL samples (0.55 mg/dL)
Mean (mg/dL)	0.730	0.644	0.522
SD	0.006	0.013	0.010
CV (%)	0.8	2.0	1.8
Inaccuracy (%)	32.7	17.2	5.1
Urine LQ samples (1.50 mg/dL)
Mean (mg/dL)	1.680	1.590	1.356
SD	0.012	0.013	0.184
CV (%)	0.7	0.8	13.5
Inaccuracy (%)	12.0	6.0	9.6
Urine MQ samples (6.00 mg/dL)
Mean (mg/dL)	6.270	6.776	6.032
SD	0.021	0.037	0.054
CV (%)	0.3	0.6	0.9
Inaccuracy (%)	4.5	12.9	0.5
Urine HQ samples (11.50 mg/dL)
Mean (mg/dL)	11.880	11.748	12.022
SD	0.025	0.039	0.122
CV (%)	0.2	0.3	1.0
Inaccuracy (%)	3.3	2.2	4.5