PMID- 17146691
OWN - NLM
STAT- MEDLINE
DCOM- 20070810
LR  - 20191210
IS  - 0140-0118 (Print)
IS  - 0140-0118 (Linking)
VI  - 45
IP  - 1
DP  - 2007 Jan
TI  - Non-constraining sleep/wake monitoring system using bed actigraphy.
PG  - 107-14
AB  - This paper introduces a new method, bed actigraphy (BACT) for user-friendly 
      sleep-wake monitoring. BACT provides a non-intrusive acquisition of activity 
      data, and in particular does not require that sensors be attached to the 
      subject's body. The system consists of four load-sensing cells supporting the 
      bed, an A/D converter, and a microcontroller with appropriate software. The 
      performance of BACT was compared to that of standard polysomnography (PSG) 
      recordings and wrist-worn actigraphy (ACT). Ten normal volunteers underwent 
      overnight PSG recordings and were examined simultaneously with BACT and ACT. An 
      automatic scoring algorithm scored each 30-s epoch of the BACT recordings for 
      either 'Wake' or 'Sleep.' A sleep specialist manually scored the PSG recordings, 
      and the results were divided into 'Wake' and 'Sleep' categories. The three 
      methods showed a significant correlation when compared with in the contingency 
      test. The mean epoch-by-epoch agreements between the BACT and PSG, ACT and PSG, 
      and BACT and ACT recordings were 95.2, 92.9, and 94.3%, respectively. The mean 
      absolute differences in sleep percentage (SP) between them were 1.8 +/- 0.82, 3.4 
      +/- 1.45, and 1.9 +/- 1.16 %, respectively. BACT differentiation of the 'Wake' 
      and 'Sleep' stages proved to be sufficiently robust, and its results were 
      comparable to PSG analysis. This finding supports the experimental and clinical 
      value of bed-activity monitoring during sleep.
FAU - Choi, Byoung Hoon
AU  - Choi BH
AD  - Interdisciplinary Program in Medical and Biological Engineering, Seoul National 
      University, Graduate School, Seoul, Republic of Korea.
FAU - Seo, Jin Woo
AU  - Seo JW
FAU - Choi, Jong Min
AU  - Choi JM
FAU - Shin, Hong Bum
AU  - Shin HB
FAU - Lee, Joo Young
AU  - Lee JY
FAU - Jeong, Do Un
AU  - Jeong DU
FAU - Park, Kwang Suk
AU  - Park KS
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Validation Study
DEP - 20061205
PL  - United States
TA  - Med Biol Eng Comput
JT  - Medical & biological engineering & computing
JID - 7704869
SB  - IM
MH  - Adult
MH  - Humans
MH  - Middle Aged
MH  - Monitoring, Physiologic/instrumentation/*methods
MH  - Movement
MH  - Polysomnography
MH  - Sensitivity and Specificity
MH  - *Signal Processing, Computer-Assisted
MH  - Sleep/*physiology
MH  - Sleep Stages
MH  - Sleep Wake Disorders/diagnosis
MH  - Software
MH  - Wakefulness/*physiology
EDAT- 2006/12/06 09:00
MHDA- 2007/08/11 09:00
CRDT- 2006/12/06 09:00
PHST- 2006/04/11 00:00 [received]
PHST- 2006/10/23 00:00 [accepted]
PHST- 2006/12/06 09:00 [pubmed]
PHST- 2007/08/11 09:00 [medline]
PHST- 2006/12/06 09:00 [entrez]
AID - 10.1007/s11517-006-0134-1 [doi]
PST - ppublish
SO  - Med Biol Eng Comput. 2007 Jan;45(1):107-14. doi: 10.1007/s11517-006-0134-1. Epub 
      2006 Dec 5.