TABLE 2

The First Episode of URI, AOM, and LRI in 311 Subjects and Cumulative Incidence by Month

Age at the First EpisodeURI EpisodesAOM EpisodesLRI Episodes
nCumulative IncidencenCumulative IncidencenCumulative Incidence
% (CI)% (CI)% (CI)
1st mo of life4414 (10.7–18.5)00.041 (0.48–3.4)
2nd mo6033 (28.5–39.0)52 (0.68–3.8)32 (1.1–4.7)
3rd mo5050 (44.1–55.2)156 (4.2–9.8)64 (2.4–7.1)
4th mo3761 (56.0–66.8)1612 (8.5–11.6)66 (3.9–9.4)
5th mo2870 (65.3–74.5)2018 (14.2–22.7)89 (6.0–12.4)
6th mo2177 (72.4–81.7)1423 (18.3–27.6)611 (7.7–14.6)
>6–12 mo of age4792 (89.0–94.9)7346 (40.7–51.7)1818 (13.9–23.0)a
No. of subjects287a14351
  • CI, confidence interval. Cumulative incidence = % of subjects with at least 1 episode of URI, AOM, or LRI by specific age.

  • a Only 203 subjects were followed to 12 mo.