Physical activity and risk of breast cancer in premenopausal women.

Br J Cancer · 2003 · PMC2394493 · PMID 12942116

Europe PMC DOI

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of borderline significanceno p-value reported

In this cohort, although the results for strenuous activities of running and jogging were of borderline significance for 2 or more hours per week, power was limited because only 3% of women reported running and jogging at this level.

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a significant trendno p-value reported

Within strata of risk factors, we observed no protection among lean women and a significant trend of increased risk with higher activity levels among obese premenopausal women.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.