“…The Drake Health Registry Study (DHRS) provides participants free screening tests (urinalysis, Papanicolaou (PAP) urine cytology, and Quantitative Fluorescence Image Analysis (QFIA)) and diagnostic evaluations [Hemstreet et al, 1983[Hemstreet et al, , 1990[Hemstreet et al, , 1992[Hemstreet et al, , 1996. Detailed procedures and results of the screening program are described elsewhere [Leviton et al, , 1993Marsh et al, 1991;Marsh and Cassidy, 2003]. Besides bladder cancer screening, a primary objective of the DHRS is to evaluate total and cause-specific mortality risks among the cohort.…”