Table 2. Pittsburgh Sleep Quality Index Score and Estimated Risk of Colorectal Adenoma.

	Base Model Logistic Regression‡		Full Model Logistic Regression*		Full Model Logistic Regression with HOMA-IR**
	OR (95% CI)	p	OR (95% CI)	p	OR (95% CI)	p
Global PSQI	1.02 (0.98-1.06)	0.35	1.01 (0.97-1.04)	0.79	1.00 (0.96-1.05)	0.92
Component 1: Sleep quality	1.07 (0.90-1.28)	0.43	1.04 (0.87-1.25)	0.69	0.99 (0.80-1.21)	0.88
Component 2: Sleep latency	1.01 (0.87-1.18)	0.85	0.97 (0.83-1.14)	0.74	0.998 (0.83-1.18)	0.89
Component 3: Sleep duration	1.17 (1.03-1.34)	0.02	1.14 (1.00-1.31)	0.05	1.15 (0.99-1.34)	0.07
Component 4: Usual sleep efficiency	0.96 (0.83-1.10)	0.52	0.93 (0.80-1.07)	0.30	0.93 (0.79-1.10)	0.39
Component 5: Sleep disruptions	0.99 (0.78-1.25)	0.92	0.93 (0.73-1.19)	0.57	0.96 (0.72-1.26)	0.75
Component 6: Sleeping aid use	1.04 (0.91-1.19)	0.56	1.02 (0.90-1.17)	0.74	1.01 (0.86-1.18)	0.93
Component 7: Daytime sleepiness	1.02 (0.88-1.19)	0.77	1.00 (0.85-1.18)	0.97	0.97 (0.81-1.16)	0.73

^‡Logistic regression odds ratio and p-value, accounting for age, gender and race (338 cases and 902 controls)

^*Logistic regression odds ratio and p-value, accounting for age, gender, race, income, smoking (ever/never/current), family history of colorectal cancer (yes/no) and waist-to-hip ratio (338 cases and 902 controls)

^**Logistic regression odds ratio and p-value, accounting for age, gender, race, income, smoking (ever/never/current), family history of colorectal cancer (yes/no), waist-to-hip ratio and HOMA-IR (266 cases and 745 controls)