Welcome to NCI's
The Cancer Data Access System (CDAS) allows users to request data, images, or biospecimens from various research studies, while also providing extensive documentation and a searchable database of research projects and publications.
Biospecimen Applications
New applications for biospecimens are currently being accepted for the following project types.
Application periods close on the dates indicated at 11:59 PM EST.
The following is a list of studies that are currently available on the Cancer Data Access System. If you are interested in obtaining study data, you may begin a CDAS project for that study. All projects are reviewed by NCI trial leadership. Upon approval, you will be granted access to the requested data and/or materials for a limited period.
New applications for biospecimens are currently being accepted for the following project types.
Application periods close on the dates indicated at 11:59 PM EST.
| Prostate, Lung, Colorectal and Ovarian Cancer Screening Trial (PLCO) | National Lung Screening Trial (NLST) | Military Aviator Cancer Study (MACS) | Interactive Diet and Activity Tracking in AARP (IDATA) | Early Phase Prevention Trials (EPPT) | ||
|---|---|---|---|---|---|---|
| Participants | 155,000 | 54,000 | 893,941 | 1,000 | 16 - 200 | |
| Enrollment Years | 1993 - 2001 | 2002 - 2004 | 1992 - 2017 | 2012 - 2013 | Varies | |
| Enrollment Ages | 55-74 | 55-74 | 16+ | 50-74 | Varies | |
| Main Cancers | Prostate, Lung, Colorectal, Ovary | Lung | Colon and rectum, pancreas, melanoma, prostate, testis, urinary bladder, kidney and renal pelvis, brain and nervous system, thyroid, non-Hodgkin lymphoma, female breast, lung and bronccus | - | Multiple | |
| Additional Cancers | All Types | All Types | All Types | - | Varies | |
| Screening | Yes | Yes | - | - | Some | |
| Mortality | Yes | Yes | - | - | - | |
| Diet | Yes | - | Yes | - | - | |
| Physical Activity | Yes | - | Yes | - | - | |
| Digital Images | XRY Screens | Low-Dose CT Screens | - | - | - | - |
| Biospecimens | Blood, Buccal Cells, TMAs, Tumor Cores | TMAs, Tumor Cores | Serum | Blood, Urine, Saliva | Blood, Tissue, Urine |
View the projects on CDAS whose requests for data/biospecimens were approved. Project summaries, aims, collaborators and more are available.
View Approved Projects
Browse the complete list of publications for studies listed on CDAS. Sort by studies used, authors, journal names, publication year, and more.
View CDAS Publications