Ability of lactulose breath test results to accurately identify colorectal polyps through the measurement of small intestine bacterial overgrowth

Table 3 The peak values of methane and hydrogen in inflammatory/hyperplastic polyp, adenomatous polyp and non-polyp groups

Peak values	Polyps (n = 169)	Non-polyps (n = 213)		P value
	Inflammatory/hyperplastic polyp	Adenomatous polyp
Methane	208.2	197.86	182.52	0.168
Hydrogen within 90 min	209.53b	220.87b	172.51	0.001a

^aP < 0.05 was considered to indicate a statistically significant difference between inflammatory/hyperplastic polyp, adenomatous polyp and non-polyp groups.

^bP < 0.05 was considered to indicate a statistically significant difference between inflammatory/hyperplastic polyp and non-polyp groups or between adenomatous polyp and non-polyp groups. Univariate analysis was performed using the nonparametric tests (Kruskal-Wallis independent samples).