Table 4

 Efficacy of influenza vaccination: titres ⩾40 to influenza

SLE patients (n = 56)Healthy controls (n = 17)p Value
Fisher’s exact test was used for all variables.
SLE, systemic lupus erythematosus.
A/H1N1 ⩾40 before vaccination27 (48%)1 (6%)0.001
A/H1N1 ⩾40 after vaccination47 (84%)17 (100%)0.105
A/H3N2 ⩾40 before vaccination35 (63%)7 (41%)0.163
A/H3N2 ⩾40 after vaccination48 (86%)17 (100%)0.185
B/Hong Kong ⩾40 before vaccination14 (25%)0 (0%)0.030
B/Hong Kong ⩾40 after vaccination39 (70%)12 (71%)1.000