84 107 Two recent Mendelian randomisation studies found that body mass index was statistically significantly associated with an increased risk of squamous and small cell lung cancer but had a borderline significant inverse association with lung adenocarcinoma. 92 108 One of the Mendelian randomisation studies found a statistically significant inverse association between body mass index and total lung cancer among never smokers and a null association in ever smokers, 108 which contradicts the epidemiological evidence.
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Adiposity and cancer at major anatomical sites: umbrella review of the literature.
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