Table 2. Analyses of colorectal adenoma locations and subtype analyses of meat for meat intake and colorectal adenoma incidence.

	N	RR (95% CI)	PO	Ph	Ih2 (%)
Red meat
Total adenoma	25	1.23 (1.15–1.31)	< .01	.13	25
Proximal colon adenoma	3	1.17 (0.89–1.54)	.27	.51	0
Distal colon adenoma	10	1.20 (1.09–1.33)	< .01	.39	6
Rectal adenoma	4	1.16 (0.93–1.46)	.19	.76	0
Red meat/white meat	4	1.55 (1.10–2.20)	.01	.03	66
Processed meat
Total adenoma	10	1.15 (1.07–1.24)	< .01	.10	39
Proximal colon adenoma	0	-	-	-	-
Distal colon adenoma	4	1.34 (1.11–1.63)	< .01	.31	4
Rectal adenoma	2	0.93 (0.73–1.20)	.58	.39	0
Subtype analyses of meat
Beef	7	1.45 (1.12–1.89)	< .01	.05	52
Bacon	3	1.06 (1.03–1.31)	.02	.73	0

NOTE. Boldface indicates statistical significance.

CRA: colorectal adenoma. N: number of included studies. P_O: test for over effect. P_h: P value for heterogeneity within each subgroup. I_s²: I² value for heterogeneity within each subgroup.