Additional file 2
Summary information on the 311 genes differentially expressed in joints in the DBA/1 strain during CIA. Pairwise comparisons were performed by comparing PI, OA and CA with NA. Three criteria were applied for selecting the differentially expressed genes: the lower 90% confidence bound of fold change between the group means exceeded twofold; the absolute difference between the two groups exceeded 100; the P value threshold of the unpaired t-test was 0.05