Table 3.

Assessment of outlier removal and flooring.

Techniques	r			Number of genes in opposite categories
	Fum/O2	Fe/O2	Fe/Fum	Fum/O2	Fe/O2	Fe/Fum
No_outlier	0.76	0.84	0.76	5	1	1
Outlier_p < 0.01	0.76	0.84	0.75	4	3	1
Outlier_p < 0.05	0.76	0.84	0.75	5	5	1
No floor	0.76	0.85	0.77	2	6	2
Floor of 20	0.76	0.84	0.75	5	5	1
Floor of 50	0.77	0.84	0.78	5	4	1
Floor of 1%	0.75	0.83	0.72	7	7	2

Both techniques are dispensable for type 2 microarray analyses.