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Table 3 Meta-analysis of studies that evaluated the role of olive oil on cancer development.

From: Olive oil intake is inversely related to cancer prevalence: a systematic review and a meta-analysis of 13800 patients and 23340 controls in 19 observational studies

  Combined effect log OR 95% CI for log OR; p for heterogeneity
All studies (n = 19) -0.41 -0.53, -0.29; < 0.001
Type of cancer   
Breast cancer (n = 5) -0.45 -0.78, -0.12; < 0.001
Digestive (n = 8) -0.36 -0.50, -0.21; 0.16
Other (n = 6) -0.41 -0.59,-0.23; 0.34
Region of origin   
Mediterranean (n = 15) -0.43 -0.78, -0.12; 0.0002
Non-Mediterranean (n = 4) -0.37 -0.62, -0.13; 0.12