Table 2

Risk of influenza infection in men and women stratified by influenza vaccination status

VariablesMenWomen
VaccinatedUnvaccinatedVaccinatedUnvaccinated
OR95% CIOR95% CIOR95% CIOR95% CI
Participation in social activities (no of groups)
 0ReferenceReferenceReferenceReference
 11.02(0.76 to 1.37)0.94(0.58 to 1.53)1.14(0.86 to 1.50)0.95(0.54 to 1.67)
 ≥21.08(0.84 to 1.39)1.27(0.85 to 1.91)1.06(0.83 to 1.36)2.20(1.47 to 3.29)
Age, years
 65–69ReferenceReferenceReferenceReference
 70–741.15(0.85 to 1.56)0.80(0.53 to 1.22)0.94(0.71 to 1.25)0.39(0.24 to 0.63)
 75–790.94(0.68 to 1.30)0.98(0.61 to 1.58)0.84(0.62 to 1.14)0.54(0.32 to 0.91)
 80–840.95(0.66 to 1.36)0.69(0.35 to 1.35)0.54(0.37 to 0.80)0.60(0.31 to 1.17)
 ≥850.81(0.50 to 1.31)0.69(0.27 to 1.76)0.62(0.38 to 1.00)
Self-rated health
 GoodReferenceReferenceReferenceReference
 Not good0.98(0.74 to 1.29)0.80(0.49 to 1.31)1.49(1.15 to 1.92)1.80(1.12 to 2.87)
 Missing1.54(0.92 to 2.59)1.41(0.60 to 3.29)1.59(0.98 to 2.59)1.06(0.38 to 2.93)
Any respiratory disease
 NoReferenceReferenceReferenceReference
 Yes1.94(1.40 to 2.71)2.44(1.28 to 4.68)1.89(1.31 to 2.73)1.14(0.45 to 2.87)
Living with grandchild
 NoReferenceReferenceReferenceReference
 Yes1.21(0.92 to 1.60)1.56(0.97 to 2.49)0.98(0.75 to 1.28)0.91(0.51 to 1.61)
Educational attainment, years
 <6ReferenceReferenceReferenceReference
 6–90.87(0.37 to 2.04)0.38(0.11 to 1.29)0.90(0.43 to 1.89)1.30(0.17 to 9.76)
 10–120.73(0.31 to 1.75)0.58(0.17 to 1.96)0.77(0.36 to 1.64)1.20(0.16 to 9.14)
 ≥130.80(0.33 to 1.91)0.39(0.11 to 1.36)0.74(0.33 to 1.64)1.03(0.13 to 8.14)
 Others1.20(0.28 to 5.11)1.07(0.17 to 6.86)0.75(0.15 to 3.68)1.86(0.11 to 31.34)
 Missing0.84(0.23 to 3.14)0.26(0.03 to 2.57)1.09(0.39 to 3.01)0.57(0.03 to 9.36)
Equivalent income, million yen
 <1.99ReferenceReferenceReferenceReference
 2–3.990.87(0.68 to 1.12)0.87(0.58 to 1.31)1.09(0.84 to 1.41)1.09(0.72 to 1.67)
 >40.67(0.43 to 1.03)1.17(0.65 to 2.11)0.79(0.50 to 1.25)0.58(0.25 to 1.39)
 Missing0.66(0.84 to 1.62)0.66(0.39 to 1.12)0.94(0.71 to 1.24)0.62(0.37 to 1.03)