A Comparison of Sleep Scored from Electroencephalography to Sleep Scored by Wrist Actigraphy
Abstract
During military operations, it as been found that soldiers often are required to work for long periods o time without rest. In order to assist commanders in determining how much rest soldiers receive, various methods of monitoring activity have been used. One unobtrusive method is to use wrist activity monitors (WAMs) to determine how long soldiers are required to work with little or no sleep. This study compared data from traditionally scored sleep using electroencephalographs (EEGs) to data from WAMs to determine the ability of WAMs to measure sleep. Based on this limited comparison study, it appears that the WAM is a good instrument to use to estimate sleep time when an EEG is not possible. The percent agreement between WAM sleep time and EEG sleep time is very high, with an average of almost 89 percent. The error tended to be in the direction of overestimation of sleep time by the WAM. Also, the current method of scoring (using a set cutoff of counts) is a suitable method. However, an overestimation of sleep most likely will occur when this method is used. Therefore, whenever actigraphs are used, a conservative interpretation of the data is to discuss 'rest time' instead of 'sleep time.' ln addition, the quality of sleep as determined by normal EEG sleep staging cannot be assessed by the WAM Sleep, WAM, Wrist monitor, Activity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1993
- Accession Number
- ADA273739
Entities
People
- Jo Lynn Caldwell
- John A. Caldwell Jr.
Organizations
- United States Army Aeromedical Research Lab