Optical Method for Cardiovascular Risk Marker Uric Acid Removal Assessment during Dialysis

Table 5

Summary of results of different methods of measuring concentration of uric acid.

Method	Set	N	Concentration of UA ± SD (micromol/L)	𝑅^2	BIAS	SE	RMSE
Lab	Cal.	579	52.1 ± 23.3	—	—	—	—
	Val.	639	49.7 ± 23.0	—	—	—	—
UVa_1WL	Cal.	579	52.1 ± 22.3	0.91	0.00	6.83	6.83
	Val.	639	48.9 ± 21.8	0.86	−0.88	8.70^a,b,c	8.74^a,b,c
UVa_2WL	Cal.	579	52.1 ± 22.5	0.93	0.00	6.19	6.19
	Val.	639	48.1 ± 21.6	0.88	−1.70	8.00	8.18
UVa_3WL	Cal.	579	52.1 ± 22.6	0.94	0.00	5.52	5.52
	Val.	639	48.4 ± 21.8	0.92	−1.39	6.39	6.54
UVd_1WL	Cal.	579	52.1 ± 22.6	0.94	0.00	5.64	5.64
	Val.	639	48.2 ± 21.8	0.91	−1.57	7.05^d	7.22^d
UVd_2WL	Cal.	579	52.1 ± 22.8	0.95	0.00	4.95	4.95
	Val.	639	48.7 ± 22.3	0.93	−1.07	5.94^e	6.04^e
UVd_3WL	Cal.	579	52.1 ± 22.8	0.96	0.00	4.83	4.83
	Val.	639	48.9 ± 22.4	0.93	−0.89	5.92	5.99