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The Importance of Sample Size in Epidemiology Research
IARC cited three studies as the ones that they were assessing about liver cancer. Each additional serving of diet soft drink a week was associated with a 6% increased risk, according to one study. A third study led by the American Cancer Society found a 44% increase in liver cancer among men who never smoked and drank two or more artificially sweetened drinks a day. I think folks who read a lot of like exercise science research tend to get blown away by big sample sizes.