Table 2.

Comparison of Respondents and Nonrespondents and Additional Characteristics of Respondents’ Practices

Characteristic	GIMs		FMs
	Respondents (n = 352)	Nonrespondents (n = 91)	Respondents (n = 255)	Nonrespondents (n = 154)
Men, %	63	74	55	60
Mean age (SD), y	53.9 (8.8)	54.2 (9.1)	52.5 (9.9)	52.0 (10.1)
Region of the country, %
Midwest	20	26	26	30
Northeast	26	26	17	13
South	31	35	35	38
West	23	12	22	19
Practice location, %
Urban, inner city	45	40	26	27
Urban, non–inner city/suburban	42	43	46	49
Rural	13	18	28	24
Practice setting, %
Private practice	70	77	70	73
Community-or hospital-based	22	20	23	22
HMO or MCO	9	3	7	5
Median providers in practice, n	7	7	5	5
Proportion of patients aged <18 y
0%	49	–	5	–
1%–9%	47	–	42	–
≥10%	4	–	53	–
Proportion of patients aged 18–49 y
<10%	16	–	8	–
10%–24%	61	–	42	–
25%–49%	19	–	43	–
≥50%	4	–	7	–
Proportion of patients aged 50–64 y
0%–24%	22	–	33	–
25%–49%	66	–	57	–
≥50%	11	–	11	–
Proportion of patients aged ≥65 y
<10%	3	–	17	–
10%–24%	13	–	28	–
25%–49%	44	–	37	–
≥50%	40	–	17	–
Reported contractual relationship with insurer
Medicare	87	–	90	–
Medicaid	63	–	75	–
Private Insurance	85	–	90	–
Proportion of uninsured patients
0%	13	–	7	–
1%–9%	72	–	62	–
10%–24%	11	–	20	–
≥25%	4	–	11	–
Proportion of patients with Medicare Part B
<10%	7	–	17	–
10%–24%	21	–	41	–
25%–49%	37	–	28	–
≥50%	34	–	14	–
Proportion of patients with Medicare Part D
<10%	8	–	22	–
10%–24%	27	–	35	–
25%–49%	31	–	23	–
≥50%	24	–	10	–
Don’t know	11	–	11	–
Proportion of patients with Medicaid
<10%	72	–	52	–
10%–24%	18	–	25	–
≥25%	10	–	24	–
Proportion of patients with private insurance
0%–24%	25	–	23	–
25%–49%	35	–	31	–
50%–100%	40	–	47	–

FM = family physician; GIM = general internist; MCO = managed care organization.