Table 1.

Characteristics of certifying urologists

	N=3852
Median age (IQR)	47 (41–54)
Median annual volume of partial or radical nephrectomies (IQR)	8 (4–16)
No. male (%)	3599 (93%)
No. year of Initial certification (%) (N=3629)
1976–1990	675 (19%)
1991–1995	399 (11%)
1996–2000	851 (23%)
2001–2005	746 (21%)
2006–2010	958 (26%)
No. type of certification (%)
Initial certification	1501 (39%)
First recertification	1379 (36%)
Second recertification	972 (25%)
No. specialty (%)
Andrology	29 (1%)
Endourology	212 (6%)
Female urology	71 (2%)
General urology	3168 (82%)
Infertility	2 (0%)
Oncology	310 (8%)
Urolithiasis	60 (2%)
No. practice type (%)*
Private	2445 (63%)
Non-private	1117 (29%)
Both private and non-private	290 (8%)
No. population practice area size (%)
Less than 100,000	356 (9%)
100,000–250,000	484 (13%)
250,001–500,000	407 (11%)
500,001–1,000,000	397 (10%)
Over 1,000,000	900 (23%)
Unknown	1308 (34%)
No. region of United States (%)
Northeast	782 (20%)
South	1377 (36%)
Midwest	867 (23%)
West	816 (21%)
Foreign/Other	10 (0%)

^*Private practice included urologists in group, solo, or managed care; non-private practice included urologists employed by military/government including Veterans Affairs, academic faculty, medical administration, hospital/clinic salaried employees, urologists working in industry or those in state/local government.