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Cancer Prevention Quiz
Quiz
Approximately what percentage of US cancer cases come from modifiable factors?
Based on Islami et al. 2018.
About 42% of US cancer cases and 45% of deaths come from modifiable risk factors — smoking, obesity, physical inactivity, alcohol, UV exposure, and preventable infections.
Quiz
USPSTF recommends starting colorectal cancer screening at what age?
Updated from the older recommendation.
USPSTF updated the start age to 45 in 2021 (down from 50). This reflects increasing colorectal cancer rates in younger adults. Earlier start for those with family history.
Quiz
Which is classified by IARC as a Group 1 carcinogen (alongside tobacco and asbestos)?
From the 2015 IARC Monograph.
Processed meat (bacon, sausage, deli meat) is Group 1 — sufficient evidence of carcinogenicity. Red meat is Group 2A (probably carcinogenic). The classification is about evidence strength, not magnitude of risk — processed meat is NOT as dangerous as tobacco.
Quiz
In the Moore et al. 2016 JAMA analysis, how many cancer types showed significant risk reduction with higher physical activity?
Out of 26 cancer sites examined.
13 cancer types showed significant risk reduction with higher physical activity — including esophageal, liver, lung, kidney, and gastric cardia. This is one of the most consistent signals in nutrition oncology.
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