Skip to main content

Table 4 Number of on/off probe sets retained after filtering at selected thresholds.

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

IFN data Unfiltered FP>0
sig 254
FP25
sig375
FP50
sig475
FP75
sig593
FP100
sig795
Fraction Present 108 108 108 108 90 34
Average Signal 108 104 100 89 81 64
Vitamin A data   FP>0
sig 200
FP25
sig265
FP50
sig323
FP75
sig400
FP100
sig475
Fraction Present 31 31 31 31 27 16
Average Signal 31 26 22 17 16 13
  1. Filtering by Fraction Present (FP) and average MAS5 signal (sig) followed by threshold. On/off: probe sets with p < 0.05 for t-test and in which the sum of Present calls differed by more than 6 for IFN data and more than 4 for vitamin A data between the two treatment groups were called turned "on" or "off".
\