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Research Question:

Allium-eating vegetables lowers the chances of getting stomach cancer?

Study Design:
This overview article contained 22 case-control studies and cohort studies with more than 10000 cases together 4.

Results and conclusions:
The researchers found 4 in 10 case-control studies and cohort studies, that a high intake of allium vegetables compared to a low, the chance of getting stomach cancer significantly with 12% [95% CI = 0.67-0.91] reduced.

The researchers found in 4 cohort studies, that a high intake of allium vegetables compared to a low, the chance of getting stomach cancer non-significant with 2% [95% CI = 0.88-1.18] increased.

The researchers found in 12 case-control studies, that a high intake of garlic compared to a low, the chance of getting stomach cancer significantly with 40% [95% CI = 0.47-. 76] reduced.

The researchers found in 13 case-control studies, that a high intake of onions compared to a low, the chance of getting stomach cancer significantly with 45% [95% CI = 0.41-0.73] reduced.

The researchers concluded that eating allium vegetables, garlic and onions in particular, the chance of getting stomach cancer probably reduced. Probably because the reduced risk was not found in cohort studies.

Original title:
Allium vegetable intake and gastric cancer: A case-control study and meta-analysis by Turati F, Pelucchi C, [...], Galeone C.

Link:
http://www.ncbi.nlm.nih.gov/pubmed/25215621

Additional information about El Mondo:
Find here more studies on allium vegetables.