TABLE 2

Unadjusted and Adjusted ORs of All Young Children Being Fully Immunized Against Influenza During Their FEW (N = 762 977)

CharacteristicUnadjusted ORa (95% CI)Adjusted ORa,b (95% CI)
Normal birth wt1 (referent)1 (referent)
Normal birth wt with chronic conditions1.48 (1.39–1.58)1.24 (1.15–1.33)
Low birth wt1.36 (1.31–1.41)1.22 (1.18–1.27)
Gender
 Female1 (referent)1 (referent)
 Male1.02 (1.00–1.03)0.99 (0.97–1.01)
Age at FEW
 6–8 mo1 (referent)1 (referent)
 9–11 mo1.35 (1.32–1.39)1.34 (1.31–1.38)
 ≥12 mo1.19 (1.16–1.21)1.14 (1.12–1.17)
No. of primary care visits 1 year after birth
 3–6 visits1 (referent)1 (referent)
 7–11 visits2.56 (2.46–2.65)2.28 (2.19–2.37)
 ≥12 visits4.41 (4.25–4.57)3.93 (3.77–4.09)
PCP
 FP: low volume1 (referent)1 (referent)
 FP: high volume1.04 (1.01–1.06)1.00 (0.96–1.04)
 Pediatrician1.93 (1.89–1.98)1.85 (1.68–2.04)
Continuity of care
 Very low (<50%)1 (referent)1 (referent)
 Low (50%–67%)1.08 (1.03–1.12)1.04 (1.00–1.09)
 Medium (67%–86%)1.30 (1.25–1.35)1.19 (1.14–1.24)
 High (86%–100%)1.37 (1.32–1.42)1.39 (1.33–1.45)
Neighborhood income quintile
 Quintile 1 (lowest)1 (referent)1 (referent)
 Quintile 21.13 (1.10–1.16)1.08 (1.04–1.11)
 Quintile 31.22 (1.18–1.25)1.12 (1.09–1.16)
 Quintile 41.37 (1.33–1.41)1.20 (1.16–1.24)
 Quintile 5 (highest)1.52 (1.48–1.57)1.27 (1.23–1.32)
Rural residence
 No1 (referent)1 (referent)
 Yes0.66 (0.64–0.69)0.95 (0.91–1.00)
Mom vaccinated for influenza in year after delivery
 No1 (referent)1 (referent)
 Yes5.00 (4.90–5.09)4.31 (4.21–4.40)
Mom aged <20 y at first childbirth
 No1 (referent)1 (referent)
 Yes0.50 (0.48–0.52)0.70 (0.67–0.73)
  • a ORs comparing full vaccination to partial or no vaccination and accounting for variation between physicians.

  • b ORs adjusted for all other variables.