Table 2.

Number of “significant” cDNAs for each main factor, averaged over the number of treatment levels in each contrast

Factor (no. of contrasts)	No. of levels per contrast	Avg. no. sig. cDNAs per level per contrast P < 0.001	Avg. no. sig. cDNAs per level per contrast P < 2.6 E-06
Region (4)	2, 2, 4, 2	2,967	1,960
Species (1)	2	2,161	724
Age (4)	4, 2, 2, 2	959	380
Sex (1)	2	596	326
Social (6)	3, 3, 3, 2, 2, 2	170	25
Environment (7)	6, 2, 2, 3, 2, 5, 2	63	3

Avg. no. sig., average number of significant.