Serum gamma-glutamyl transferase level is associated with the risk of pancreatic cystic neoplasms: A nationwide retrospective cohort study

Figure 1 Study population. Participants underwent general health checkups in 2009 (index period), and a one-year lag period was applied. The follow-up period was until December 31, 2020. Among the 2896383 participants aged 40 years or older, those with a history of pancreatitis or pseudocyst (n = 64763), or a previous diagnosis of pancreatic cystic neoplasm (n = 4298), those with missing data (n = 160987), or those who were diagnosed with pancreatic cystic neoplasm or died within the one-year lag period (n = 10670) were excluded. The final study population consisted of 2655665 individuals, of whom 28940 developed pancreatic cystic neoplasm during the follow-up period.