TABLE 4.

Differences per 10 000 Person-Months in the Rate of Influenza-Associated Hospitalizations Between the Influenza Periods and Periseasonal and Summer Baseline Periods for Healthy and High-Risk Children

Risk and Age GroupsDifference in the Rate of Influenza-Associated Hospitalizations During Influenza Periods Versus
Periseasonal Baseline RateSummer Baseline Rate
Healthy children
 6–23 mo3.9 (−2.0 to 10.0)5.1 (−1.0 to 11.0)
 2–4 y1.6 (−1.0 to 5.0)3.2 (0.1 to 6.0)
 5–17 y−0.10 (−1.0 to 1.0)−0.40 (−1.0 to 0)
High-risk children
 6–23 mo6.1 (−28.0 to 41.0)21.3 (−12.0 to 55.0)
 2–4 y−3.7 (−28.0 to 21.0)14.2 (−10.0 to 38.0)
 5–17 y−3.1 (−12.0 to 6.0)10.3 (2.0 to 19.0)
  • Rates significantly different from zero at α = .05 are shown in bold type.