Research Paper Volume 13, Issue 14 pp 18564—18585
Chocolate consumption and all-cause and cause-specific mortality in a US population: a post hoc analysis of the PLCO cancer screening trial
Figure 2. The study flow chart of identifying eligible participants. The percentage in the figure was calculated as the number of participants excluded by each exclusion criterion divided by the total number of participants in the PLCO Cancer Screening Trial (i.e., 154897). PLCO, Prostate, Lung, Colorectal, and Ovarian; DHQ, diet history questionnaire.