Table 2.

CMV DNA Viral Load Values Obtained from Participating Laboratories

	Mean copies/ml (log)
	Member 1	Member 2	Member 3	Member 4
Laboratory	2.70 copies/ml	3.70 copies/ml	4.70 copies/ml	5.70 copies/ml	R2	Slope	Bias	Bias P
1	4.12	4.37	5.08	5.97	0.94755	0.63125	NS	0.08
2	*	*	4.00	4.78			NS	0.09
3	3.27	4.04	5.18	5.74	0.98133	0.85886	NS	0.07
4	2.92	3.89	5.01	5.75	0.98767	0.94608	NS	0.15
5	2.54	3.17	4.47	5.02	0.97411	0.85588	−0.44	0.04
6	3.02	3.64	4.79	5.94	0.98114	1.00206	NS	0.28
7	3.53	4.72	5.77	6.58	0.99112	1.02726	0.93	0.0007
8	3.06	3.98	4.97	6.02	0.99937	0.98805	0.30	0.0005
9	2.79	3.59	4.76	5.70	0.99473	0.99357	NS	0.93
10	3.36	4.31	5.27	6.25	0.99998	0.96493	0.59	0.0001
11	2.77	3.84	4.92	5.93	0.99898	1.04234	NS	0.09
12	2.98	3.76	4.63	5.68	0.98906	0.89979	NS	0.99
13	2.59	3.80	4.71	5.66	0.99493	1.01562	NS	0.73
14	4.08	5.20	6.10	7.25	0.99789	1.04226	1.4	<0.0001
15	2.04	3.20	4.26	5.56	0.99848	1.17756	−0.47	0.03
16	2.71	3.68	4.73	5.67	0.99835	1.02046	NS	0.08
17	*	3.45	4.14	4.75	0.99851	0.64993	NS	0.10
18	2.51	3.50	4.62	5.63	0.99952	1.04313	−0.14	0.02
19	*	3.29	4.30	4.97	0.99929	0.83920	−0.60	0.02
20	2.60	3.68	4.72	5.68	0.99907	1.03937	NS	0.25
21	2.53	3.54	4.46	5.47	0.99992	1.01326	−0.26	0.0001
22	2.30	2.95	3.74	4.83	0.96067	0.86626	−0.82	0.01
23	3.41	4.30	5.04	5.45	0.97437	0.69326	NS	0.20
Mean	2.96	3.81	4.77	5.66

^*Samples with undetectable CMV were excluded from the analysis.