Table 3.

Logistic regression analysis adjusted for clustering for lack of timely follow-up of abnormal diagnostic imaging alerts (all characteristics with p<0.2 in univariate analysis)

Independent Variable	p-value	OR (95% CI)
Communication Characteristics
Electronic Alert + Verbal Communication **	0.0004	0.12 (0.04-0.38)
Electronic Alert + Admission †	0.0035	0.22 (0.08-0.38)
Referent: Electronic Alert Communication*
Ordering Provider Characteristics
Physician Assistant	0.45	0.77 (0.39 - 1.55)
Nurse Practitioner	0.90	1.06 (0.42- 2.7)
Trainee	0.30	1.49 (0.70- 3.2)
Referent: Attending physician
Types of Abnormal Imaging Reported
CT scan	0.01	0.50 (0.29- 0.85)
MRI	0.18	0.47 (0.16- 1.43)
Ultrasound	0.91	0.96 (0.44- 2.07)
Referent: X-ray
Ordering Provider Specialty
Emergency care	0.22	0.53 (0.20- 1.45)
Surgery	0.25	0.64 (0.30- 1.37)
Other specialties	0.10	0.53 (0.25- 1.13)
Referent: Primary care
Dual vs. Single Communication
Dual	0.03	1.99 (1.06- 3.50)
Referent: Single

^*Only electronic communication of alert

^**Electronic and verbal communication of alert

^†Electronic communication of alert followed by a hospital admission prior to chart review