TABLE 3.

Rate per 10 000 Person-Months of Hospitalizations for Influenza and Other Respiratory Illnesses Among Healthy and High-Risk Children During Defined Seasonal Periods

Risk Group, Seasonal Period, and Age GroupNo. of Outpatient VisitsNo. of Person-MonthsRate/10 000 Person-Months (95% CI)Race-Adjusted Rate/10 000 Person-Months (95% CI)
Healthy children
 Influenza period
  6–23 mo1413 51710.4 (6.0 to 17.0)10.6 (5.0 to 17.0)
  2–4 y1729 7445.7 (3.0 to 9.0)
  5–17 y13116 0671.1 (1.0 to 2.0)
 RSV period
  6–23 mo2517 19114.5 (9.0 to 21.0)14.8 (9.0 to 21.0)
  2–4 y1537 4574.0 (2.0 to 7.0)
  5–17 y21148 3261.4 (1.0 to 2.0)
 Periseasonal baseline period
  6–23 mo3046 5266.4 (4.0 to 9.0)6.8 (4.0 to 9.0)
  2–4 y42102 0174.1 (3.0 to 6.0)
  5–17 y49394 8211.2 (.70 to 2.0)
 Summer baseline period
  6–23 mo2038 1145.2 (3.0 to 8.0)5.8 (3.0 to 8.0)
  2–4 y2183 5092.5 (2.0 to 4.0)
  5–17 y50338 4281.5 (1.0 to 2.0)
High-risk children
 Influenza period
  6–23 mo81 75344.6 (19.0 to 88.0)69.2 (28.0 to 109.0)
  2–4 y153 53142.5 (24.0 to 70.0)
  5–17 y3014 02121.4 (14.0 to 31.0)
 RSV period
  6–23 mo142 26861.7 (34.0 to 103.0)69.5 (33.0 to 105.0)
  2–4 y284 54761.6 (41.0 to 89.0)
  5–17 y3517 97419.5 (14.0 to 27.0)
 Periseasonal baseline period
  6–23 mo246 22938.5 (25.0 to 67.0)41.4 (25.0 to 58.0)
  2–4 y5612 13046.2 (35.0 to 60.0)
  5–17 y11747 76524.5 (20.0 to 29.0)
 Summer baseline period
  6–23 mo125 14523.3 (12.0 to 41.0)30.6 (15.0 to 46.0)
  2–4 y2910 24828.3 (19.0 to 41.0)
  5–17 y4641 46211.1 (8.0 to 15.0)