Skip to main content

Table 5 Number of very significant probe sets lost after filtering in smaller experiments.

From: Effects of filtering by Present call on analysis of microarray experiments

 

Probe sets at p ≤ 0.001

Probe sets at p ≤ 0.001 lost by filtering at selected thresholds

# samples

Unfiltered

> 0%

≥ 25%

≥ 50%

≥ 75%

100%

3

59

10

10

11

12

13

4

165

12

12

14

16

20

5

333

12

14

16

21

28

6

528

12

14

18

27

43

7

718

14

17

25

40

68

8

897

16

21

32

50

99

  1. Number of probe sets at p ≤ 0.001 found in the unfiltered IFN data, and the number of those lost by filtering at each of several fraction Present thresholds, for experiments with 3 to 8 samples per treatment group.