Table 4.

Adjusted Odds Ratios (OR's) for association of sigmoidoscopy/colonoscopy receipt with advanced stage at diagnosis of non-small lung cancer, stratified by age, sex, and smoking status

Sigmoidoscopy/Colonoscopy	Advanced Stage Regional/Distant/Unknown
	OR	95% CI
Age*
Age <65	0.70	(0.32 - 1.55)
Age ≥65	0.53	(0.30 - 0.94)
P for interaction	0.68
Gender**
Women	0.59	(0.31 - 1.14)
Men	0.52	(0.27 - 1.00)
P for interaction	0.63
Smoking Status***
Current smoker	0.65	(0.30 - 1.42)
Former, Quit <10 yr	0.19	(0.04 - 0.87)
Former, Quit ≥10 yr	0.56	(0.28 - 1.16)
P for interaction	0.46

*Adjusted for gender, smoking status, income (included missing as a category), education, race/ethnicity, comorbidity, & self-reported emphysema

**Adjusted for age, smoking status, income (included missing as a category), education, race/ethnicity, comorbidity, & self-reported emphysema

***Adjusted for age, gender, income (included missing as a category), education, race/ethnicity, comorbidity, & self-reported COPD