Table 1.

Characteristics of PRINS Clinicians and NAMCS Physicians

	Percentage of Clinicians, Weighted
Characteristic	PRINS	NAMCS Mean (95% CI)
Specialty
Family medicine/general practice	34.2	43.2 (40.8–45.6)
Internal medicine	8.7	36.7 (34.7–38.7)
Pediatrics	52.9	20.1 (18.5–21.7)
Other	4.2	0.0 (–)
Region
Northeast	20.4	22.8 (20.8–24.8)
Midwest	25.6	23.4 (21.0–25.8)
South	28.7	29.7 (26.5–32.9)
West	25.3	24.2 (21.6–26.8)
MSA status
MSA	77.5	79.1 (77.3–80.9)
Non-MSA	19.7	20.9 (17.1–24.7)
Missing	2.8	0.0 (–)
Discipline
Physician	89.0	100.0 (NA)
Resident	3.9	0.0
APN/NP	5.4	0.0
Physician’s assistant	1.7	0.0
Missing	0.0	0.0
Sex
Male	53.0	76.8 (NA)
Female	47.0	23.2
Age
<50 years	70.0	66.5 (63.7–69.3)
≥50 years	28.4	33.5 (30.7–36.3)
Missing	1.6	0.0 (–)
Ethnicity
Non-Hispanic	94.0	NA
Hispanic	5.3
Missing	0.7
Race
White	85.3	NA
Black/African American	3.3
Asian	10.0
Native Hawaiian/other Pacific Islander	0.4
American Indian/Alaska Native	0.1
More than 1 race	0.3
Missing	0.6
Who owns this practice?*
Hospital	24.9	8.6 (6.8–10.4)
Physician or physician group	54.6	75.9 (73.1–78.7)
Other health care corporation	15.2	8.3 (6.5–10.1)
Health maintenance organization	0.1	3.2 (2.2–4.2)
Other	3.9	4.0 (2.8–5.2)
Missing	1.3	0.0 (–)
Employment status†
Owner	37.6	63.8 (60.6–67.0)
Employee (or contractor–PRINS)	61.1	30.8 (27.6–34.0)
Contractor (NAMCS)	–	5.4 (4.2–6.6)
Missing	1.3	0.0 (–)

PRINS = Primary Care Network Survey; NAMCS = National Ambulatory Medical Care Survey; CI = confidence interval; MSA = Metropolitan Statistical Area; APN = advanced practice nurse; NP = nurse-practitioner; NA = not available or not applicable.

* Response choices as listed on the PRINS form. The NAMCS response choice “medical/academic health center” is included in “hospital.”

† PRINS includes 2 categories (owner, employee/contractor); NAMCS includes 3 categories (owner, employee, contractor).