Table 3.

Comparison of microarray versus RT-PCR

	Ratio*	Pairs†	Percentage‡
Microarray:Taqman	1:1	44	55
	1.5:1	4	5
	2:1	3	4
	> 3:1	1	1
	1:1.5	12	15
	1:2	6	8
	> 1:3	10	12
Total		80	100

^*The ratio of expression levels (relative to unchallenged controls) determined by microarray compared to RT-PCR. The ratio of 1:1 is defined as 1:1-1.4. The genes analyzed are listed in Table 2. ^†Number of microarray:RT-PCR data pairs. Twenty genes were analyzed at four time points, equaling 80 data pairs. ^‡Percentage of each category in the total number of data pairs.