TABLE 3

Number of Preventable ED Visits in 12-Month Study Follow-Up Period, Unadjusted and Matched Samples, for EMH Intervention and Usual Care Groups

VariableNo. (%) of ED VisitsTotalZ ScoreP
01≥2
Unadjusted Sample
 Usual care566 (81.2)85 (12.2)46 (6.6)697−0.15a.88a
 Intervention184 (81.8)27 (12.0)14 (6.2)225
 Total750 (81.3)112 (12.1)60 (6.5)922
Matched Sample
 Usual care146 (64.9)34 (15.1)45 (20.0)225−2.66b.004b
 Intervention184 (81.8)27 (12.0)14 (6.2)225
 Total330 (73.3)61 (13.6)59 (13.1)450
  • a Normal approximation to 2-sample Wilcoxon ranked sum test is used. Based on 10 imputed data sets.

  • b Normal approximation to matched sample bootstrapped Wilcoxon signed rank test is used. Based on 10 imputed data sets.