Table 3.

Geometric mean titers and factor-increases in the geometric mean titer after influenza A (H1N1) 2009 vaccination in patients with juvenile autoimmune rheumatic disease and controls.

Geometric Mean TiterFactor-increase in Geometric Mean Titer (95% CI)
NBefore Immunization, % (95% CI)After Immunization, % (95% CI)
Control9112.4 (9.7–15.7)250.8 (196.3–320.3)20.3 (15.6–26.4)
JARD23711.4 (9.7–13.3)147.2 (119.7–181.1)*12.9 (10.7–15.7)*
JSLE9910.9 (8.5–13.9)91.1 (66.0–125.8)*8.4 (6.3–11.2)*
JIA9310.8 (8.4–13.8)217.2 (159–296.7)20.2 (14.8–27.5)
JDM1815.3 (8.9–26.3)201.6 (95.4–425.8)13.2 (7.2–24.1)
JScl1112.1 (6.0–24.2)181.5 (70.2–469.4)15.0 (6.3–35.9)
Primary vasculitis1614.1 (6.8–29.2)182.2 (68.1–487.4)12.9 (5.9–28.2)
  • * p < 0.05. JARD: juvenile autoimmune rheumatic diseases; JSLE: juvenile systemic lupus erythematosus; JIA: juvenile idiopathic arthritis; JDM: juvenile dermatomyositis; JScl: juvenile scleroderma.