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. Author manuscript; available in PMC: 2014 Dec 4.
Published in final edited form as: JAMA Intern Med. 2013 Oct 14;173(18):1694–1701. doi: 10.1001/jamainternmed.2013.9241

Table 5.

Emergency Department and Hospitalization Rates in the Intervention and Control Clinicsa

Intervention Clinic
Control Clinics
Outcome Baseline
(n = 4296)		 Postintervention
(n = 4679)		 Baseline
(n = 7821)		 Postintervention
(n = 8899)		 Dif in Difb P Valuec
Total use 79 82 78 76 +5 .91
Emergency department visit ratea 53 55 51 52 +1 .92
Hospital visit ratea 26 27 28 25 +5 .02

Abbreviation: Dif, difference.

a

Rates are visits per 1000 patients per month.

b

Positive numbers represent an increase in utilization rates in the intervention clinic vs control clinics. Discrepancies in the Dif values result from rounding.

c

P values represent adjusted values from the regression analysis.