Kim MH, et al. - Because aspirin can attenuate the incidence of various cancer types, researchers examined the link between aspirin use and incident pancreatic cancer in a large Asian cohort. They avoided immortal time bias by dividing a 12-year nationwide longitudinal cohort merged with the health checkup data into an “exposure ascertainment period” and an “outcome ascertainment period”. They used a daily defined dose system to determine the drug exposure. Findings revealed no significant link between aspirin use and incident pancreatic cancer based on HR, suggesting that pancreatic cancer cannot be prevented by aspirin.