Table 1.

Characteristics of Physicians and Physician Practices

	Overall (N=500)	Physician Age
		Younger (<50y)(N=283)	Older (50+ y) (N=217)
Age, mean±SD	48 (±8)	43 (±5)	55 (±5)
Years practicing, mean±SD	17 (±7)	12 (±5)	23 (±4)*
Gender (%)
Male	85	78	95*
Specialty (%)
PCP	60	65	54†
CARD	20	17	24
OBGyn	20	18	23
Practice region (%)
East	30	32	28
West	16	16	16
South	32	31	35
Central	22	22	22
Solo practice type (%)	28	20	38*
% Patients ≥65 y, mean (SD)	33 (±16)	32 (±15)	35 (±17)
% Caucasian patients, mean (SD)	70 (±22)	69 (±22)	71 (±22)
% Female patients, mean (SD)	64 (±19)	64 (±18)	65 (±20)

^*Significant difference between older (50+ years) and younger (<50 years) physicians at P<.01, using a z-statistic of proportions.

^†Significant difference between older (50+ years) and younger (<50 years) physicians at P<.05, using a z-statistic of proportions.

SD, standard deviation; PCP, Primary care; CARD, cardiology; OBGyn, obstetrics/gynecology. Rounding error may result in sums<or>than 100.