. Author manuscript; available in PMC: 2019 Sep 10.

Published in final edited form as: Cancer Causes Control. 2019 Jul 9;30(9):979–987. doi: 10.1007/s10552-019-01205-y

Table 2.

Odds ratios of the association between index serrated polyps (n = 918) and advanced colorectal neoplasia according to histology, size, location, and number of serrated polyps

	Cases n (%)	Controls n (%)	Adjusted OR^a (95% CI)
Histology
HPs only	39 (67)	662 (77)	1.00 (Ref)
SSA/Ps	19 (33)	198 (23)	1.79(0.98–3.28)
Size
All < 10mm	43 (74)	632 (73)	1.00 (Ref)
Any 10 +mm	6 (10)	87 (10)	0.95 (0.38–2.34)
Location
Rectum/Rectosig	11(19)	235 (27)	1.00 (Ref)
Left	17 (29)	192 (22)	1.62(0.73–3.60)
Right	24 (41)	334 (39)	1.64(0.75–3.58)
Number of serrated polyps
1	40 (69)	650 (76)	1.00 (Ref)
2	13 (22)	138 (16)	1.49 (0.78–2.87)
3	3 (5)	46 (5)	1.19 (0.35–4.02)
4 +	2 (3)	26 (3)	1.46 (0.34–6.32)

Adjusted for age at index (continuous), sex, BMI (continuous with multiple imputation), smoking status (never vs. ever with multiple imputation), and year between index and subsequent procedure