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Table 2 Correlates of vaccine efficacy final logistic regression models based on baseline/pre-vaccination variables

From: HAI and NAI titer correlates of inactivated and live attenuated influenza vaccine efficacy

  LAIV IIV
  OR (95% CI) P OR (95% CI) P
Vacc 0.69 (0.38, 1.25) 0.224 0.05 (0.01, 0.28) 0.001
Evervax 0.70 (0.24, 2.05) 0.512 0.25 (0.03, 1.96) 0.189
Day 0 HAI 0.84 (0.74, 0.96) 0.007 0.71 (0.60, 0.84) 0.000
Day 0 NAI 0.60 (0.46, 0.78) 0.000 0.37 (0.20, 0.71) 0.002
Evervax:Day 0 NAI 1.69 (1.17, 2.43) 0.005 2.97 (1.30, 6.78) 0.010
Vacc:Evervax    16.81 (0.99, 284.65) 0.051
Vacc:Day 0 NAI    2.73 (1.31, 5.71) 0.008
Vacc:Evervax:Day 0 NAI    0.23 (0.08, 0.66) 0.006
  1. All models adjust for age, sex and race at baseline. Vacc = 1 or 0 if assigned vaccine or placebo; Evervax = 1 or 0 if self-reported ever having an influenza vaccination yes or no; HAI and NAI titers are log base 2 transformed. Entries for two-way interactions (e.g., Vacc:Evervax) are ratios of odds ratios, and for three-way interactions (Vacc:Evervax:Day 0 NAI) are ratios of ratios of odds ratios