Zhu H, et al. - Researchers analyzed relevant data from eligible studies to assess the association between body mass index (BMI) and lung cancer risk in never smokers. The studies were identified from electric databases to July 1, 2017 and, using random-effects models, the data were pooled. Analysis included twenty-nine studies with more than 10,000 lung cancer cases in 15 million never smokers. They found that never smokers demonstrated an inverse linear dose-response association between BMI and lung cancer risk. In most subgroup analyses, the results remained steady. However, women, but not men, showed a significant inverse association when stratified by sex. Overall, higher BMI was found to be related to lower lung cancer risk in never smokers.