Questions about the public use dataset:

Questions about downloading or working with the public use NCS dataset should be directed to SAMHDA staff at: samhda-support@icpsr.umich.edu.

Questions about downloading or working with the public use NCS-R dataset should be directed to ICPSR staff at: cpes@icpsr.umich.edu.

All other questions and comments including those regarding the website please contact: ronkadm@hcp.med.harvard.edu.