Journal
PHYSIOLOGY & BEHAVIOR
Volume 72, Issue 1-2, Pages 21-28Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0031-9384(00)00355-3
Keywords
actillume; actigraph; acceleration; polysomnography; validation; postmenopausal
Categories
Funding
- NHLBI NIH HHS [HL55983] Funding Source: Medline
- NIA NIH HHS [AG123G4, AG15763] Funding Source: Medline
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [R01HL055983] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE ON AGING [R01AG015763] Funding Source: NIH RePORTER
Ask authors/readers for more resources
Two validation studies were conducted to optimize the sleep-detection algorithm of the Actillume, The first study used home recordings of postmenopausal women (age range: 51 to 77 years), which were analyzed to derive the optimal algorithm for detecting sleep and wakefulness from wrist activity data, both for nocturnal in-bed recordings and considering the entire 24 h. The second study explored the optimal algorithm to score in-bed recordings of healthy young adults (age range: 19 to 34 years) monitored in the laboratory. Tn Study I, the algorithm for in-bed recordings (n=39) showed a minute-by-minute agreement of 85% between Actillume and polysomnography (PSG), a correlation of .98, and a mean measurement error (ME) of 21 min for estimates of sleep duration. Using the same algorithm to score 24-h recordings with Webster's rules, an agreement: of 89%, a correlation of .90, and 1 min ME were observed. A different algorithm proved optimal to score in-bed recordings (n = 31) of young adults, yielding an agreement of 91%, a correlation of .92, and an ME of 5 min. The strong correlations and agreements between sleep estimates from Actillume and PSG in both studies suggest that the Actillume can reliably monitor sleep and wakefulness both in community-residing elderly and healthy young adults in the laboratory. However, different algorithms are optimal for individuals with different characteristics. (C) 2001 Elsevier Science Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available