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. Author manuscript; available in PMC: 2016 Apr 1.
Published in final edited form as: Clin Gastroenterol Hepatol. 2014 Oct 25;13(4):739–746. doi: 10.1016/j.cgh.2014.10.020

Table 2.

Distribution of Patient Characteristics by Physician Adenoma Detection Rate Quartile for Screening Colonoscopies*


Quartile 1
% (SD)
Quartile 2
% (SD)
Quartile 3
% (SD)
Quartile 4
% (SD)
Total
% (SD)

Sex
 Female 54 (3) 54 (3) 52 (3) 53 (4) 53 (3)
 Male 46 (3) 46 (3) 48 (3) 47 (4) 47 (3)
Exam Indication
 Screening 21 (11) 20 (5) 17 (5) 19 (5) 19 (7)
Race/Ethnicity
 White 64 (13) 65 (10) 61 (10) 59 (12) 62 (12)
 Hispanic 7 (4) 9 (4) 11 (5) 9 (4) 9 (4)
 Black 8 (9) 4 (3) 6 (3) 7 (6) 6 (6)
 Asian/PI 8 (5) 10 (6) 11 (7) 15 (9) 11 (7)
 Native American 0.4 (0.3) 0.4 (0.2) 0.4 (0.3) 0.4 (0.3) 0.4 (0.3)
 Unknown 10 (5) 11 (6) 8 (3) 9 (3) 9 (4)
Age (years)
 50–54 19 (3) 19 (3) 19 (3) 19 (3) 19 (3)
 55–59 19 (2) 19 (2) 18 (2) 19 (2) 19 (2)
 60–64 20 (2) 19 (2) 19 (1) 19 (2) 19 (2)
 65–69 15 (2) 15 (2) 15 (1) 15 (1) 15 (2)
 70–74 12 (2) 12 (2) 13 (2) 12 (1) 12 (2)
 75+ 16 (3) 16 (3) 17 (3) 16 (3) 16 (3)
 Mean age 64 (1) 64 (1) 64 (1) 64 (1) 64 (1)
Family History of CRC
 Yes 7 (3) 7 (3) 6 (3) 6 (2) 6 (3)

SD, standard deviation; PI, Pacific Islander; CRC, colorectal cancer.

*

Quartiles are based on adenoma detection rates for screening exams in male and female patients combined. The exam indication variable reflects the proportion of exams that had a screening indication.