Modification by cofactors in the impacts of body mass index change on the risk of biliary tract cancers.
INTRODUCTION AND OBJECTIVES The impact of body mass index (BMI) change on the risk of biliary tract cancer, considering effect modification by age, smoking, and menopausal status, remains unexplored. PATIENTS AND METHODS Cancer-free individuals who underwent health examinations in 2010 and 2014 were followed until 20...