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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 2.

Overall and sex specific serrated 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%)
Serrated
N		 Rate, %
(95% CI)		 Rate, %
(95% CI)		 Rate, %
(95% CI)
All Patients 2,071 9.6
(9.2 - 10.0)		 11.0
(10.4 - 11.7)		 8.5
(8.0 - 9.0)
Smoking Never
(N=10,921)		 905 8.2
(7.8 - 8.8)		 9.7
(8.9 - 10.6)		 7.2
(6.6 - 7.9)
< 20 Pack Years
(N=4,254)		 410 9.6
(8.8 - 10.6)		 11.0
(9.5 - 12.5)		 8.7
(7.7 - 9.9)
≥ 20 Pack Years
(N=5,423)		 652 12.0
(11.2 - 12.9)		 13.2
(12.0 - 14.6)		 10.9
(9.8 - 12.1)
BMI < 30
(N=13,778)		 1,214 8.8
(8.3 - 9.3)		 10.1
(9.4 - 10.9)		 7.8
(7.3 - 8.4)
≥ 30 (Obese)
(N=7,036)		 779 11.1
(10.3 - 11.8)		 12.6
(11.5 - 13.7)		 9.7
(8.8 - 10.7)
1

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