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

Table 3 Baseline characteristics associated with seroprotection post-vaccination (S2) versus not achieving seroprotection

Baseline characteristics	H1N1		H3N2		B
Baseline characteristics	Odds ratio*	p value	Odds ratio*	p value	Odds ratio*	p value
Sex (Female vs Male)	3.5	<0.01	2.0	0.02	1.2	0.56
High risk medical condition (Yes vs No)	1.2	0.60	0.8	0.53	1.1	0.74
Recent illness or stressor (Yes vs No)	0.5	0.71	0.8	0.58	0.8	0.60
Site (Vanderbilt vs Marshfield)	0.4	0.01	1.0	0.96	0.5	0.01

*Odds ratios all adjusted for variables in table plus age, BMI, and transformed S1 titer using multivariable logistic regression.

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