Additional file 1.
Additional Table 1. HAI seroprotection proportion. Peripheral blood was obtained prior to (baseline), and one and six months following vaccination with trivalent influenza vaccine (TIV) throughout multiple years. Influenza-specific serum antibody was measured by hemagglutination inhibition assay (HAI) for the indicated influenza type. The number of subjects with HAI titer of 40 or higher/total number of subjects (%) are indicated. Relative difference in geometric mean titer (GMT) among rheumatoid arthritis (RA) groups as compared with the healthy control (HC) group at same time point indicated by color. Cells with bold outline indicate significant difference (P < 0.05) as compare with the HC group at same timepoint.
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Kobie et al. Arthritis Research & Therapy 2011 13:R209 doi:10.1186/ar3542