Table 2. Total precision of chemiluminescent immunoanalyzer-based interferon gamma releasing assay.

Samples	Site	Target value (IU/mL)	Mean value (IU/mL)	Repeatability		Between-Run		Between-Day		Within-lab		Reproducibility
				SD	% CV	SD	% CV	SD	% CV	SD	% CV	SD	% CV
1	1	90.21	86.49	4.20	4.86	4.67	5.40	3.73	4.31	5.80	6.70	5.46	6.36
	2		85.12	4.91	5.77	3.37	3.96	2.70	3.18	5.01	5.88
2	1	34.30	37.14	2.34	6.30	1.86	5.01	1.39	3.75	2.53	6.82	2.74	7.55
	2		35.33	2.18	6.18	1.55	4.39	1.37	3.89	2.34	6.62
3	1	2.47	2.38	0.13	5.60	0.10	4.11	0.05	2.31	0.13	5.43	0.17	7.24
	2		2.25	0.13	5.79	0.10	4.49	0.08	3.76	0.14	6.40
4	1	1.05	1.07	0.07	7.00	0.06	5.69	0.05	4.48	0.08	7.80	0.08	7.88
	2		1.02	0.05	4.99	0.04	3.7	0.05	4.45	0.06	6.25

Abbreviation: % CV, coefficient of variation expressed as percentage.