TABLE 3

Captured Immunization Opportunities

ParameterAll Visits and All Study Vaccines IncludedCorrecting for DTaP Schedule Change and PCV Shortagea
Control, % (N)Intervention, % (N)Risk Difference (95% CI)Control, % (N)Intervention, % (N)Risk Difference (95% CI)
Any vaccine given if child is due
    Well78.2 (11 772)90.3 (10 318)12.2 (11.2–13.1)80.3 (11 202)92.7 (9362)12.4 (11.4–13.3)
    Sick11.3 (8137)32.0 (5610)20.7 (19.3–22.1)13.2 (6741)37.4 (3947)24.2 (22.5–25.9)
Any shot given if child is vaccine delayed
    Well83.3 (4122)88.2 (3368)4.9 (3.3–6.5)89.1 (3700)94.5 (2660)5.4 (4.1–6.7)
    Sick17.7 (2995)36.3 (2286)18.6 (16.2–21.0)22.8 (2203)45.5 (1371)22.6 (19.5–25.8)
All due vaccines given
    Well47.3 (11 772)80.7 (10 318)33.4 (32.2–34.6)61.6 (11 202)88.2 (9362)26.6 (25.5–27.7)
    Sick5.9 (8137)27.8 (5610)21.9 (20.6–23.1)9.5 (6741)34.0 (3947)24.5 (22.8–26.1)
  • N is the total number of possible immunization opportunities.

  • a Correction excluded visits with only PCV due. With the correction, DTaP 4 was included in the calculation of captured immunization opportunities beginning at 15 months of age. In the main analysis, it was included beginning at 12 months of age.