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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 2.

Characteristics of Clinic Patients

Intervention Clinic
Control Clinics
P Valueb
Characteristic Preintervention
(n = 4296)		 Postintervention
(n = 4679)		 P Valuea Preintervention
(n = 7821)		 Postintervention
(n = 8899)		 P Valuea
Mean age, y 51.6 51.3 .19 50.9 51.0 .47 .002
Female sex, % 56.8 57.5 .55 55.1 55.7 .44 .008
Race/ethnicity, %
 Asian 9.6 9.8 9.0 9.3
 Black 7.1 7.3 7.7 7.5
 Hispanic 74.7 74.8 .72 74.6 74.8 .92 .37
 White 7.5 6.8 7.5 7.3
 Other 1.2 1.4 1.2 1.2
Insurance, %
 Self-pay 15.9 14.9 16.5 15.6
 Medicaid 32.9 26.5 <.001 30.3 27.9 .002 .48
 Free care program 39.9 46.9 41.8 44.7
 Other 11.4 11.7 11.4 11.8
Preferred language, %
 English 33.2 33.6 35.1 34.6
 Spanish 60.6 60.0 .79 59.1 59.5 .79 .03
 Other 6.2 6.4 5.7 5.8
a

For comparisons between patients in the preintervention vs postintervention periods.

b

For comparisons between patients in the intervention clinic vs control clinics.