Fig 2. Flow chart of the procedure used to select participants for the study.

The original cohort consisted of 10,198 participants in 2011. We excluded 2,689 persons who did not come to the health check-up in 2012, 2 people aged 17 years old or under, and 906 people who lacked at least one variable that was used for analysis. We used data from 6,601 participants for analysis.