TABLE 4

Use Rate Ratios from Conditional Poisson Models Comparing Exposed and Unexposed Children

Use OutcomeModelAge Group
3–11 mo (n = 7072)1–2 y (n = 7771)3–5 y (n = 10 767)6–12 y (n = 23 544)13–17 y (n = 20 511)
Rate Ratio (95% CI)PRate Ratio (95% CI)PRate Ratio (95% CI)PRate Ratio (95% CI)PRate Ratio (95% CI)P
WCC visitsUnivariatea0.97 (0.93–1.01).120.95 (0.89–1.01).101.01 (0.95–1.08).761.03 (0.97–1.10).350.96 (0.89–1.04).27
Adjustedb0.96 (0.92–1.00).070.94 (0.88–1.01).070.99 (0.93–1.06).820.99 (0.93–1.06).750.92 (0.85–0.99).04
Sick visitscUnivariatea1.15 (1.12–1.18)<.00011.19 (1.16–1.23)<.00011.22 (1.18–1.26)<.00011.36 (1.33–1.39)<.00011.36 (1.33–1.39)<.0001
Adjustedb1.14 (1.11–1.17)<.00011.16 (1.12–1.20)<.00011.19 (1.15–1.23)<.00011.24 (1.21–1.27)<.00011.21 (1.18–1.24)<.0001
ED visitsUnivariatea1.22 (1.12–1.33)<.00011.29 (1.17–1.43)<.00011.18 (1.05–1.32).0051.41 (1.29–1.54)<.00011.55 (1.44–1.68)<.0001
Adjustedb1.23 (1.12–1.34)<.00011.31 (1.18–1.46)<.00011.15 (1.02–1.30).021.28 (1.16–1.41)<.00011.35 (1.24–1.46)<.0001
Inpatient visitsUnivariatea1.21 (0.91–1.61).191.65 (1.11–2.45).0131.19 (0.75–1.89).453.55 (2.69–4.69)<.00011.99 (1.68–2.35)<.0001
Adjustedb1.18 (0.84–1.66).331.35 (0.81–2.25).250.87 (0.47–1.61).662.02 (1.22–3.34).0061.51 (1.22–1.85)<.0001
  • CI indicates confidence interval.

  • a Visit rate ratio (exposed/unexposed) from univariate conditional Poisson model.

  • b Adjusted visit rate ratio from conditional Poisson model controlling for the child's gender, number of parents, and the pediatric RxRisk risk-adjustment variable.

  • c Sick visits to primary care department.