Risk prediction rule for advanced neoplasia on screening colonoscopy for average-risk individuals

Table 2 Binary logistic regression and internal validation

Patient factors	Binary logistic regression				1000 bootstrap
	β-coefficient	SE	P value	OR (95%CI)	P value	AOR (95%CI)
Age (yr)	0.035	0.018	0.048	1.04 (1-1.07)	0.047	1.04 (1-1.08)
BMI category
Normal (< 25 kg/m2)	0		0.018	1.00 (ref)
Overweight (25-29.99 kg/m2)	0.794	0.417	0.057	2.21 (0.98-5)	0.042	2.21 (1.09-6.49)
Obese (≥ 30 kg/m2)	1.265	0.447	0.005	3.54 (1.48-8.51)	0.004	3.54 (1.5-11.32)
Smoking (pack-years)
No			0.002	1.00 (ref)
< 40 pack-years	0.697	0.353	0.048	2.01 (1.01-4.01)	0.048	2.01 (0.95-4.37)
≥ 40 pack-years	1.376	0.385	0.000	3.96 (1.86-8.42)	0.001	3.96 (1.78-9.24)
Daily red meat	0.702	0.400	0.079	2.02 (0.92-4.42)	0.082	2.02 (0.72-4.41)
Constant	-6.467	1.213	0.000		0.001

SE: Standard error, OR: Odds ratio, AOR: Adjusted odds ratio.