TABLE 2.

Cox Proportional-Hazard Models: Ages 6 Months to 8 Years

ILI Outcome, 2351 ILI Events (N = 29 726)P&I Codes, 809 P&I Events (N = 29 726)
Univariate Model, HRR (95% CI)Adjusting for Gender, Age, and Prior Illness, HRR (95% CI)VE, %*Univariate Model, HRR (95% CI)Adjusting for Gender, Age, and Prior Illness, HRR (95% CI)VE, %*
Fully vaccinated0.85 (0.73–0.99)0.77 (0.66–0.90)230.56 (0.42–0.76)§0.49 (0.36–0.67)51
Partially vaccinated1.17 (1.04–1.31)§0.93 (0.82–1.04)70.89 (0.73–1.10)0.77 (0.62–0.95) 23
Female gender0.99 (0.92–1.08)0.98 (0.85–1.13)
Age
    6–11 mo5.32 (4.51–6.27)3.97 (2.86–5.50)
    12–23 mo3.68 (3.16–4.27)4.27 (3.25–5.61)
    2–4 y2.34 (2.05–2.68)3.43 (2.70–4.35)
    5–6 y1.32 (1.13–1.54)1.51 (1.14–1.99)§
    7–8 yReferentReferent
Chronic conditions
    Asthma1.44 (1.24–1.67)§1.44 (1.12–1.85)§
    Diabetes mellitus1.85 (0.60–5.75)
    Allergic rhinitis2.35 (1.64–3.37)3.20 (1.83–5.60)
    Gastrointestinal disorder1.40 (1.10–1.76)§1.40 (0.91–2.16)
    History of mental health0.60 (0.15–2.39)
    Liver or renal disorder, malignancy, transplant0.37 (0.09–1.47)1.23 (0.31–4.92)
  • * VE percent is estimated as (1 − adjusted HRR) × 100.

  • P < .05.

  • P < .001.

  • § P < .01.

  • Not in model; small number of illnesses, with limited variability according to outcome.