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. 2019 Jan;17(1):7–13. doi: 10.1370/afm.2340

Table 2.

Association Between Immunization History and Occurrence of ≥1 RI Episode During Influenza Season

% RI Crude OR Adjusted OR
Episodes (95% CI) (95% CI)
Immunized in current year but no (recent) prior IIV immunization 7.0 Ref Ref
Immunized in current year and 1 IIV in previous 2 years 3.5 0.48 (0.37-0.61) 0.61 (0.47-0.78)
Immunized in current year and ≥2 IIVs in previous 3 years, including prior year 3.7 0.50 (0.41-0.62) 0.85 (0.68-1.07)

GP = general practitioner; IIV = inactivated influenza vaccine; OR = odds ratio; SES = socioeconomic status; RI = respiratory illness.

Note: Adjusted for SES, age, number of indication categories for IIV, health care–seeking behavior, and number of out-season summer GP-diagnosed RI episodes.