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Colorectal cancer occurs primarily in western countries, suggesting that lifestyle factors contribute to risk. In this prospective Danish cohort study that involved more than 55,000 people (age range, 50–64), investigators determined the association between a simple lifestyle index and incidence of colon cancer. At baseline, the participants scored 1 point for each of the following:
Not smoking
Being physically active ≥30 minutes daily
Weekly alcohol intake ≤7 drinks for women and ≤14 drinks for men
Waist circumference <35 inches for women and <40 inches for men
A healthy diet (i.e., rich in fruits and vegetables and low in fat and red meat)
The sum of these scores generated a lifestyle-index score ranging from 0 (least healthy) to 5 (most health…