TABLE 3

Age-Specific Incidence of Hospitalization Attributable to CA LCI in an Urban Neighborhood Cohort: Philadelphia, 2000–2004

Number Hospitalized With InfluenzaChild-Years of ObservationEstimated Incidencea OR (95% CI)
All age groups231340 5406.8 (2.6–14.4)
0–23 mo14635 08041.6 (30.2–56.7)
2–4 y3752 1367.0 (2.8–14.4)
5–11 y27142 0601.9 (0.2–7.2)
12–17 y21111 2641.8 (0.2–7.2)
  • Neighborhood cohort was defined by home residence within 9 contiguous zip-code areas with >70% referral rate for asthma at CHOP and <19 years of age.

  • a Estimated incidence is the number of cases of influenza hospitalizations per 10000 child-years of observation.