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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: J Clin Gastroenterol. 2017 Nov-Dec;51(10):e95–e100. doi: 10.1097/MCG.0000000000000795

Table 1.

Overall and sex specific adenoma detection rates and 95% confidence intervals for patient risk factors among NHCR screening colonoscopies (4/6/2009 -9/13/2013)

Risk Factors1 All Colonoscopies
N=21,539		 Male
N=9,491 (44%)		 Female
N=12,048 (56%)
Adenoma
N		 Rate, %
(95% CI)		 Rate, %
(95% CI)		 Rate, %
(95% CI)
All Patients 5,083 23.6
(23.0 - 24.2)		 30.2
(29.3 - 31.2)		 18.4
(17.7 - 19.1)
Smoking Never
(N=10,921)		 2,294 21.0
(20.2 - 21.8)		 27.5
(26.2 - 28.8)		 16.0
(15.1 - 17.0)
< 20 Pack Years
(N=4,254)		 940 22.1
(20.9 - 23.4)		 29.2
(27.1 - 31.4)		 17.3
(15.8 - 18.8)
≥ 20 Pack Years
(N=5,423)		 1,614 29.8
(28.5 - 31.0)		 35.8
(34.0 - 37.7)		 24.2
(22.7 - 25.9)
BMI < 30
(N=13,778)		 3,002 21.8
(21.1 - 22.5)		 28.1
(27.0 - 29.3)		 17.1
(16.2 - 17.9)
≥ 30 (Obese)
(N=7,036)		 1,887 26.8
(25.8 - 27.9)		 33.7
(32.1 - 35.3)		 20.7
(19.4 - 22.0)
1

Missing (N): Smoking (941); BMI (725).