Table 1.

Description of the four cohorts included in this analysis with details on blood collection

HPFSNHS IPHSWHI
Years of enrollment1986197619821994-1998
Age at entry (y)40-7530-5540-8450-79
Study designObservationalObservationalTrialObservational
Years of blood acquisition1993-19951989-19901982-19841994-1998
No. bloods obtained18,01832,82614,91693,676
No. pancreatic cancer cases (with bloods)29465468
No. pancreatic cancer cases (fasting)2132068