Joint analysis of two microarray gene-expression data sets to select lung adenocarcinoma marker genes

BMC Bioinformatics

Table 1 The out-of-bag and prediction errors¹ of the last 15 nested probe sets² using GSRF.

No. of probe sets	Out-of-bag error			Prediction error		Probe set ID (HG_U95Av2)
	D1³	D2³	C³	D1→D2³	D2→D1³
1	1	1	2	1	2	268_at
2	1	1	1	0	1	+ 35868_at
3	1	0	1	0	1	+ 1596_g_at
4	1	0	1	0	0	+ 38430_at
5	0	0	1	0	0	+ 32542_at
6	0	0	0	0	0	+ 40282_s_at
7–12	0	0	0	0	0	+198_at, 32184_at, 39031_at, 36627_at, 1815_g_at, 39631_at
13	0	1	0	0	0	+ 40419_at
15	0	0	0	0	0	+1814_at, 39350_at

¹: The number of misclassified samples. ²: Sets of genes (probe sets) produced by iteratively removing 10% of the least significant genes at a time. ³: D1: Data set 1; D2: Data set 2; C: Combined data set; D1→D2: use D1 to predict D2; D2→D1: use D2 to predict D1. +: Additional probe set ID plus those identified from lower number probe-set list(s). For example, the 3 probe sets contains 1596_g_at in addition to those (35868_at and 268_at) identified from the 2 probe sets prediction.

ISSN: 1471-2105