Table 1.

Practice and Patient Characteristics by Intervention Group Status at Baseline

	Total	Intervention group	Control group	P-Value
Practice/physician characteristics, N
Number of practice sites	12	6	6
Community health center	4	2	2
Number of physicians (median per practice)	138 (12.5)	64 (10.5)	74 (13.5)
Age, mean (SD)	47.2 (9.8)	47.4 (9.9)	47.0 (9.8)	0.78
Gender, % female (SD)	69 (50%)	31 (48%)	38 (51%)	0.86
Years since medical school graduation, mean (SD)	19.5 (10.0)	19.9 (10.2)	19.2 (9.9)	0.67
Years in primary care network, mean (SD)	14.6 (10.0)	14.2 (10.4)	14.8 (9.8)	0.72
Patient characteristics, N (%)	N = 6,730	N = 3,054 (45%)	N = 3,676 (55%)
Patient-physician connectedness status				0.49
Physician-Connected	3,691	1,689 (55%)	2,002 (54%)
Practice-Connected	3,039	1,365 (45%)	1,674 (46%)
Age, mean (SD)	54.0 (8.0)	53.7 (7.9)	54.2 (8.0)	0.02
Median	52.9	52.7	53.2
Ethnicity				<0.001
Non-Hispanic white	5,068	2,395 (78%)	2,673 (73%)
Hispanic	554	143 (5%)	411 (11%)
African-American	500	211 (7%)	289 (8%)
Asian	317	170 (6%)	147 (4%)
Other /unknown	291	135 (4%)	156 (4%)
Primary language spoken, English	6,062	2,820 (92%)	3,242 (88%)	<0.001
Insurance status				<0.001
Commercial health insurance	4,163	2,057 (67%)	2,106 (57%)
Government insurance	1,832	748 (24%)	1,084 (29%)
Medicare	933	393 (13%)	540 (15%)
With secondary Medicaid	383	134 (4%)	249 (7%)
Medicaid	899	355 (12%)	544 (15%)
No insurance, self-pay	735	249 (8%)	486 (13%)
Months since last practice visit, mean (SD)	10.7 (9.7)	10.8 (9.8)	10.6 (9.6)	0.50
Practice visits in past 3 years, mean number (SD)	6.6 (7.0)	6.5 (6.7)	6.6 (7.3)	0.73