Table 4.

Classification accuracy of four original signatures on across-laboratory data.

Original signatures	GSE4570 (2004)	GSE4587 (2005)	GSE7553 (2008)	GSE12391 (2010)	GSE22301 (2011)	Average
(Hoek et al., 2004) (589)	100%	100%	97.78%	100%	100%	99.56%
(Smith, Hoek & Becker, 2005) (100)	71.43%	100%	97.78%	100%	100%	93.84%
(Riker et al., 2008) (65)	71.43%	100%	95.56%	100%	100%	93.40%
(Scatolini et al., 2010) (455)	85.71%	100%	97.78%	100%	100%	96.70%
New 12-gene biomarkers	100%	100%	95.56%	100%	100%	99.11%