Table 4.

Instrument Summary Data. End of Cycle Report for Urine Total Protein. RCPA QAP Basic Urine Chemistry Programme, Cycle 52 July – November 2010. Statistics are derived from median performance over 12 samples (duplicates at six concentrations) for each instrument group as in Table 2. See the RCPA Chemical Pathology QAP website¹⁸ for more detailed explanation of the statistical processes.

Instrument	No. Labs	SD	CV	Low 0.12	High 2.07
Roche Diagnostics Hitachi Cobas c701/c702	1	0.026	2.3	0.11	2.11
Roche Diagnostics Hitachi Cobas c501/c502	26	0.025	2.3	0.11	2.06
Dimension Xpand	6	0.025	2.4	0.10	1.94
INTEGRA 700/800	31	0.028	2.5	0.12	2.11
Dimension XL/RXL/RXL MAX	25	0.029	2.7	0.12	1.97
Roche Diagnostics Hitachi Modular	25	0.033	2.9	0.12	2.10
Roche Diagnostics Hitachi 912	3	0.036	3.1	0.17	2.11
Abbott ARCHITECT c4000/c16000	7	0.032	3.1	0.11	1.94
Abbott AEROSET	1	0.036	3.4	0.11	1.99
INTEGRA 400/400+	7	0.039	3.5	0.12	2.08
Beckman Coulter LX20/LX40	3	0.042	3.6	0.13	2.22
ADVIA1200	1	0.038	3.6	0.10	2.00
Beckman Coulter AU600/640	13	0.046	3.7	0.12	2.05
Beckman Coulter AU2700/AU5421/AU5432	12	0.046	3.7	0.15	2.24
Abbott ARCHITECT C8000	15	0.042	4.1	0.12	1.94
Roche Diagnostics Hitachi 917	2	0.049	4.3	0.15	2.10
ADVIA 2400	12	0.050	4.8	0.13	2.03
VITROS 5,1 F S/5600 (c)	7	0.036	4.9	0.10	1.73
Beckman Coulter UniCel DxC 600/601i	30	0.058	4.9	0.15	2.22
Dimension Vista	3	0.053	5.0	0.14	1.95
Beckman Coulter AU400	1	0.062	5.1	0.14	2.28
Beckman Coulter Synchron CX5	12	0.060	5.4	0.14	2.14
Spectrophotometric Plate Reader	1	0.078	6.0	0.13	2.47
VITROS 250/350	4	0.041	6.6	0.22	1.02
Beckman Coulter UniCel DxC 800	10	0.085	7.3	0.16	2.13
ADVIA 1650/1800	4	0.085	8.0	0.11	2.01
Vital Scientific SELECTRA E	1	0.123	10.2	0.16	2.17
ThermoFisher Scientific KoneLab 30i	1	0.273	26.2	0.25	1.84
Siemens Healthcare Diagnostics	1	0.556	41.2	0.04	2.66