Table 4

Mean CVs for all targets passing presence / absence filter in analysis of U133A and U133B arrays

Mean CV with signal method (%)

Mean CV with ratio method (%)

Reduction in mean CV with ratio method (%)

U133A, initial scan, 9276 targets

8 samples from young men

26.5

21.2

20

8 samples from old men

26.5

19.2

28

U133A, antibody-enhanced scan, 10665 targets

8 samples from young men

25.8

20.2

22

8 samples from old men

23.5

18.4

22

U133B, initial scan, 5766 targets

8 samples from young men

29.8

23.9

20

8 samples from old men

27.5

22.1

20

U133B, antibody-enhanced scan, 7571 targets

8 samples from young men

28.1

22.2

21

8 samples from old men

26.1

20.4

22

Welle et al. BMC Bioinformatics 2002 3:23   doi:10.1186/1471-2105-3-23