Table 2. Meta-regression analysis examining the role of potential modifiers in the association between cancer risk and olive oil consumption.

Variables	Category or increment	Overall cancer			Breast cancer			Gastrointestinal cancer
		n§	Exponentiated coefficient (95%CI)	P	n§	Exponentiated coefficient (95%CI)	p	n§	Exponentiated coefficient (95%CI)	p
Percentage of males	10% increase	44	0.99 (0.95–1.03)	0.540	-	N/A		15	0.94 (0.89–1.00)	0.052
Mean age of study	10 year increase	35	0.85 (0.63–1.15)	0.280	-	Not performed, 9 studies		14	0.91 (0.58–1.42)	0.639
Publication year	1 year increase	45	1.00 (0.98–1.01)	0.867	14	1.00 (0.95–1.04)	0.845	15	1.00 (0.98–1.02)	0.751

^§number of studies.