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. Author manuscript; available in PMC: 2016 Apr 1.
Published in final edited form as: Acad Emerg Med. 2015 Mar 16;22(4):468–474. doi: 10.1111/acem.12632

Table 1.

Characteristics of Study Cohort, n (%)

Characteristic Overall
(N=128,564)
Revisit: No
(n=114,880)
Revisit: Yes
(n=13,684)
P value
Age group, yrs
  18 to 39 46,775 (36.4) 41,508 (36.1) 5,267 (38.5) <0.001
  40 to 59 58,912 (45.8) 52,727 (45.9) 6,185 (45.2)
  60 to 75 18,193 (14.2) 16,402 (14.3) 1,791 (13.1)
  75 to 89 4,684 (3.6) 4,243 (3.7) 441 (3.2)
Sex
  Male 78,429 (61.3) 70,162 (61.4) 8,267 (60.6) 0.056
  Female 49,509 (38.7) 44,123 (38.6) 5,386 (39.4)
Race/Ethnicity
  White, Non-Hispanic 75,040 (61.7) 66,514 (61.3) 8,526 (64.4) <0.001
  Black, Non-Hispanic 5,344 (4.4) 4,836 (4.5) 508 (3.8)
  Hispanic 29,878 (24.6) 26,747 (24.7) 3,131 (23.6)
  Other 11,408 (9.4) 10,328 (9.5) 1,080 (8.2)
Urban-Rural Classification
  Large metro 93,061 (72.6) 83,386 (72.8) 9,675 (70.9) <0.001
  Small metro 30,797 (24.0) 27,369 (23.9) 3,428 (25.1)
  Micropolitan 2,902 (2.3) 2,555 (2.2) 347 (2.5)
  Non metro/micro 1,411 (1.1) 1,216 (1.1) 195 (1.4)
Primary payer
  Medicare 15,401 (12.0) 13,809 (12.0) 1,592 (11.6) <0.001
  Medicaid 13,260 (10.3) 11,386 (9.9) 1,874 (13.7)
  Private insurance 75,043 (58.4) 67,543 (58.8) 7,500 (54.8)
  Other 24,824 (19.3) 22,111 (19.3) 2,713 (19.8)
Household income
  First quartile (low) 28,647 (22.8) 25,525 (22.7) 3,122 (23.3) 0.009
  Second quartile 32,127 (25.5) 28,681 (25.5) 3,446 (25.7)
  Third quartile 32,307 (25.7) 28,804 (25.6) 3,503 (26.1)
  Fourth quartile (high) 32,756 (26.0) 29,429 (26.2) 3,327 (24.8)
Urologists per capita
  First quartile (low) 33,597 (26.2) 29,752 (26.0) 3,845 (28.2) <0.001
  Second quartile 30,525 (23.8) 27,206 (23.8) 3,319 (24.4)
  Third quartile 35,255 (27.5) 31,638 (27.6) 3,617 (26.6)
  Fourth quartile (high) 28,699 (22.4) 25,862 (22.6) 2,837 (20.8)
Day of visit
  Mon-Fri 91,697 (71.3) 81,893 (71.3) 9,804 (71.6) 0.379
  Sat/Sun 36,867 (28.7) 32,987 (28.7) 3,880 (28.4)