Flowchart of Eligible Prostate, Lung, Colorectal, and Ovarian (PLCO) Cancer Screening Trial Participants for the Study Analysis
Cancer
CANCER
The final cohort included participants who were older than 55 years with completed information to calculate body mass index (BMI) and aspirin frequency information. BQ indicates baseline questionnaire; SQ, supplemental questionnaire.The initial analysis of PLCO Cancer Screening Trial data occurred after 13 years of follow-up or December 31, 2009, whichever came first.