title: Intelligent Systems For Assessing Aging Changes: home-based, unobtrusive, and continuous assessment of aging.
abstract: OBJECTIVE
  To describe a longitudinal community cohort study, Intelligent Systems for Assessing Aging Changes, that has deployed an unobtrusive home-based assessment platform in many seniors homes in the existing community.
  
  
  METHODS
  Several types of sensors have been installed in the homes of 265 elderly persons for an average of 33 months. Metrics assessed by the sensors include total daily activity, time out of home, and walking speed. Participants were given a computer as well as training, and computer usage was monitored. Participants are assessed annually with health and function questionnaires, physical examinations, and neuropsychological testing.
  
  
  RESULTS
  Mean age was 83.3 years, mean years of education was 15.5, and 73% of cohort were women. During a 4-week snapshot, participants left their home twice a day on average for a total of 208 min per day. Mean in-home walking speed was 61.0 cm/s. Participants spent 43% of days on the computer averaging 76 min per day.
  
  
  CONCLUSIONS
  These results demonstrate for the first time the feasibility of engaging seniors in a large-scale deployment of in-home activity assessment technology and the successful collection of these activity metrics. We plan to use this platform to determine if continuous unobtrusive monitoring may detect incident cognitive decline.
authors: Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd, Portland, Oregon 97239-3098, USA. kaye@ohsu.edu
authors: Jeffrey A
authors: JA
authors: Kaye
authors: Shoshana A
authors: SA
authors: Maxwell
authors: Nora
authors: N
authors: Mattek
authors: Tamara L
authors: TL
authors: Hayes
authors: Hiroko
authors: H
authors: Dodge
authors: Misha
authors: M
authors: Pavel
authors: Holly B
authors: HB
authors: Jimison
authors: Katherine
authors: K
authors: Wild
authors: Linda
authors: L
authors: Boise
authors: Tracy A
authors: TA
authors: Zitzelberger
mesh_terms: D000203:Activities of Daily Living / Q000523:psychology; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology / Q000523:psychology; D016009:Chi-Square Distribution; D003072:Cognition Disorders / Q000175:diagnosis / Q000209:etiology / Q000523:psychology; D005191:Family Characteristics; D005260:Female; D006801:Humans; D016014:Linear Models; D008137:Longitudinal Studies / Q000295:instrumentation / Q000379:methods*; D008297:Male; D009043:Motor Activity; D009483:Neuropsychological Tests; D009922:Oregon; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires