Table 2 Geometric mean titres
StrainsWG n  =  49Healthy controls n  =  49pv WG n  =  32n-pv WG n  =  17
A/H1N1
    Before vaccination13.69.918.17.8**
    After 1 month (fi)62.9 (4.6)101.0 (10.2)*49.7 (2.7)98.1 (12.6)*
    After 3–4 months37.560.7*30.256.6*
A/H3N2
    Before vaccination18.912.0*20.017.0
    After 1 month (fi)122.3 (6.5)138.9 (11.6)114.4 (5.7)138.7 (8.2)
    After 3–4 months68.570.668.768.0
B
    Before vaccination17.911.2**22.012.0*
    After 1 month (fi)68.5 (3.8)59.4 (5.2)62.4 (2.8)81.6 (6.8)
    After 3–4 months42.333.542.242.5
  • (Left) Comparison of geometric mean titres in Wegener’s granulomatosis patients (WG) versus healthy controls. (Right) Comparison of geometric mean titres in WG patients who received influenza vaccination in the previous year (previously vaccinated; pv WG) versus WG patients who did not receive an influenza vaccination in the previous year (not previously vaccinated; n-pv WG). fi, fold increase. *p<0.05; **p<0.01.