Table 2.

Summary Statistics for colorectal cancer rates (per 100,000) in Iran

Incidence rate	Gender	Effect sizes and 95 % confidence interval				Heterogeneity
		Number studies	Point estimate	Lower limit	Upper limit	Q-value	df	I-squared	P-value
ASR	Male	29	8.16	6.64	9.68	68.18	28	57.69	<0.001
	Female	29	6.17	5.01	7.32	48.43	28	42.19	0.010
CR	Male	22	5.58	4.22	6.94	44.04	21	52.32	0.002
	Female	22	4.01	3.06	4.97	27.69	21	24.15	0.15

ASR age standard rate, CR crude rate