TABLE 5

ITSA of Weekly Admission Rates for Patients in the Study Cohort Before and After Guideline Publication

Estimate (95% CI)P
Infants 0–60 d of age
 Intercept (β0)0.897 (0.882 to 0.913)<.001
 Baseline trend (β1)0.000 (0.000 to 0.001).517
 Level change after guideline (β2)−0.047 (−0.077 to −0.017).002
 Trend change after guideline (β3)0.000 (−0.001 to 0.000).214
 Postintervention linear trend0.000 (−0.001 to 0.000).273
Infants 61–365 d of age
 Intercept (β0)0.865 (0.840 to 0.891)<.001
 Baseline trend (β1)0.000 (−0.001 to 0.000).605
 Level change after guideline (β2)−0.046 (−0.086 to −0.007).022
 Trend change after guideline (β3)−0.002 (−0.003 to −0.001)<.001
 Postintervention linear trend−0.002 (−0.003 to −0.001)<.001