TABLE 2.

Differences per 100 Person-Months in the Rate of Influenza-Associated Outpatient Visits 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 Outpatient Visits During Influenza Periods Versus
Periseasonal Baseline RateSummer Baseline Rate
Healthy children
 6–23 mo1.8 (1.1 to 2.4)8.9 (8.3 to 9.5)
 2–4 y1.6 (1.2 to 2.0)5.8 (5.5 to 6.2)
 5–17 y1.2 (1.0 to 1.4)3.6 (3.4 to 3.7)
High-risk children
 6–23 mo2.6 (0.24 to 5.0)16.1 (13.9 to 18.4)
 2–4 y−3.9 (−5.6 to 2.3)12.1 (10.5 to 13.7)
 5–17 y0.033 (−0.71 to 0.77)7.8 (7.1 to 8.5)