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Table 4 Baseline characteristics associated with maintaining versus not maintaining HAI ≥1:40 at S3

From: Factors associated with maintenance of antibody responses to influenza vaccine in older, community-dwelling adults

  H1N1 H3N2 B
N=126 N=407 N=354
Odds ratio* p-value Odds ratio* p-value Odds ratio* p-value
Sex (Female) 1.2 0.77 1.1 0.70 0.8 0.46
High risk (Yes) 1.4 0.57 1.7 0.12 0.9 0.70
Recent Illness or stressor (Yes) 3.3 0.16 1.6 0.37 10.6 0.003
Site (Vanderbilt vs Marshfield) 2.3 0.11 1.6 0.14 1.4 0.30
  1. *Odds ratios all adjusted for variables in table plus age, BMI, days between S3 and S1 and transformed S1titer using multivariable logistic regression.