Additional data were collected for several subpopulations of PLCO. For some published studies, their population of interest, data collected and publications can be found here.

• Benign Ovarian Pathology
• Free PSA
• Study of Colonoscopy Utilization (SCU)
• Contamination Survey
• CMS Chronic Conditions derived from CMS
• DHQ Alcohol
• Healthy Lifestyle DHQ
• Healthy Lifestyle DQX
• Recurrent Adenoma