Table 2.

Correlations Among PCMH Scores, Covariates, and Operating Costs

	Operating Cost per FTE Physician		Operating Cost per Patient per Month		Medical Cost per Medical Visit
	r	P Value	r	P Value	r	P Value
PCMH scoresa
Total PCMH score	0.04	.30	0.18	<.001	0.06	.13
PCMH subscales
Access/communication	−0.02	.56	0.03	.41	0.03	.44
Care management	0.06	.09	0.18	<.001	0.09	.02
External coordination	−0.04	.34	0.10	.01	−0.03	.38
Patient tracking	0.09	.03	0.18	<.001	0.10	.01
Test/referral tracking	0.03	.37	0.08	.04	0.01	.87
Quality improvement	0.05	.16	0.15	<.001	0.02	.57
Covariates
Health center size
Physician FTEs	−0.37	<.001	0.05	.17	−0.09	.02
Visits	−0.08	.04	0.04	.35	−0.17	<.001
Patients	−0.10	.01	−0.10	.01	−0.20	<.001
Organizational characteristics
Self-sufficiencyb	−0.10	.01	−0.04	.36	−0.28	<.001
Patients per physician FTE	0.54	<.001	−0.43	<.001	−0.32	<.001
Patient characteristics
Female	−0.19	<.001	−0.16	<.001	−0.12	.001
White	0.15	<.001	0.07	.08	−0.04	.28
Age, y	<0.01	.93	0.11	.004	<0.01	.98
Chronic diseasec	−0.06	.14	−0.13	<.001	−0.12	.002
Managed cared	−0.24	<.001	0.05	.22	0.09	.02

Abbreviations: FTE, full-time equivalent; PCMH, patient-centered medical home.

^aFrom the Safety Net Medical Home Scale.¹⁴

^bPercentage of total health center revenue that is not derived from grants provided by the Health Resources and Services Administration under section 330 of the Public Health Service Act.

^cPercentage of clinic visits that are for patients with select chronic disease diagnoses tracked in the Health Resources and Services Administration’s Uniform Data System: diabetes, select heart disease diagnoses (International Classification of Diseases, Ninth Revision, Clinical Modification codes 391.xx-392.0x; 410.xx-429.xx), hypertension, asthma, chronic bronchitis, emphysema, human immunodeficiency virus, hepatitis B, and hepatitis C.

^dPercentage of patients enrolled in managed care.