Data
179,190 items of data are available, covering 179,190 participants, encoded using Data-Coding
2582.
Notes
Sleep online question: "Please rate your problems with concentration, memory, and thinking skills during the past 7 days. Trouble figuring things out or solving problems"
The question in this field was taken from the British Columbia Cognitive Complaints Index (BC-CCI-E) and included with permission from the author. © 1998, 2005, 2007 Grant Iverson
Iverson GL, Lam RW. Rapid screening for perceived cognitive impairment in major depressive disorder. Annals of Clinical Psychiatry. 2013 May;25(2):135-40.