Re: [HCP-Users] Unpaired twins in the Restricted Family and Demographics Data?

[Harms, Michael]

Hi, There is a substantial number of subjects yet to be released (200+).  Until we do that, it is very difficult to accurately assess the number of “unpaired twins” in the final sample. cheers, -MH --  Michael Harms, Ph.D. ----------------------------------------------------------- Conte Center for the Neuroscience of Mental Disorders Washington University School of Medicine Department of Psychiatry, Box 8134 660 South Euclid Ave. Tel: 314-747-6173 St. Louis, MO  63110 Email: mha...@wustl.edu From: <hcp-users-boun...@humanconnectome.org> on behalf of "Wolmetz, Michael E." <michael.wolm...@jhuapl.edu> Date: Thursday, September 15, 2016 at 7:24 AM To: "hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org> Subject: [HCP-Users] Unpaired twins in the Restricted Family and Demographics Data? HCPers,   In looking carefully at the Restricted Family and Demographics Data, there are some potential discrepancies I’d like to better understand.   In the restricted CSV data sheet, there are many subjects labeled as Twin-MZ or Twin-Non MZ with no twin counterpart in the dataset. For MZ twins , there seem to be 31 cases where the Mother ID is included (and who also have unique Father IDs), but do not seem to have another Twin-MZ with the same mother ID. For DZ twins, there are similarly 45 cases of missing counterparts. There are also two sets of DZ twins for which there is a third child of the same mother also labeled as Twin-Non MZ, but with a different or unknown Father ID.   Can you help me understand these issues in the Restricted Family and Demographics Data, and how best to address or resolve them? I assume that there are a few cases in which the data for the left out twin is simply yet to be released, and a few cases in which the left out twin chose not to participate, but there seem to be more unpaired twins than I would have expected.   Thank you for the help. I didn’t notice any discussion of this issue in the available documentation, but I apologize if I missed it.     Best, Mike   _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users   The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail. _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users