This claim says that smoking causes more cancer worldwide than any other risk factor we can change, responsible for about 15 out of every 100 cancer cases. Infections come next at 10 cases, and alcohol at 3 cases.

20

Pro

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Against

Evidence from Studies

Supporting (1)

20

Community contributions welcome

20

Global and regional cancer burden attributable to modifiable risk factors to inform prevention.

Cross-Sectional Study

Human

2026 Feb 3

The study looked at the same things as the claim—smoking, infections, and alcohol—and found the exact same numbers, so it supports the claim fully.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Global and regional cancer burden attributable to modifiable risk factors to inform prevention.

Score: 20

DOI: 10.1038/s41591-026-04219-7

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