Table 5.

OR and 95% confidence intervals for colorectal adenoma by urinary 1- and 3-methylhistidine levels

	OR (95% CI)*
	Q1	Q2	Q3	Q4	Continuous
Log 1-methylhistidine
Quartile cutpoints	3.44 – 4.58	>4.58 – 5.01	>5.01 – 5.42	>5.42 – 6.61
OR (95% CI)	1.0	0.81 (0.40–1.66)	0.97 (0.46–2.05)	0.78 (0.35–1.74)	0.90 (0.53–1.54)
Log 3-methylhistidine
Quartile cutpoints	3.78 – 5.07	>5.07 – 5.86	>5.86 – 6.57	>6.57 – 8.20
OR (95% CI)	1.0	0.89 (0.43–1.85)	0.90 (0.44–1.85)	0.70 (0.34–1.46)	0.90 (0.69–1.17)

^*Adjusted for age, sex, education, race, BMI, family history of cancer, smoking status, total hours spent in moderate + vigorous physical activity, and intake of fiber (g/day)