title: Assessment of physical activity in older people with and without cognitive impairment.
abstract: The purpose of this study was to validate a new interview-administered physical activity questionnaire (Assessment of Physical Activity in Frail Older People; APAFOP) in older people with and without cognitive impairment. The authors assessed feasibility, validity, and test-retest reliability in 168 people (n = 78 with, n = 88 without cognitive impairment). Concurrent validity was assessed against an inertia-based motion sensor and an established questionnaire. Sensitivity to change was tested in an ongoing study in patients with mild to moderate dementia (n = 81). Assessment of physical activity by the APAFOP and the motion sensor correlated well in the total sample (TS; p = .705), as well as in the subsamples with cognitive impairment (CI; p = .585) and without CI (p = .787). Excellent feasibility with an acceptance rate of 100%, test-retest reliability (intraclass correlation coefficients ranging from .973 (TS) to .975 (CI) to .966 (no CI), and sensitivity to change (effect sizes: 0.35-1.47) were found in both subsamples.
authors.affiliation: Bethanien-Krankenhaus-Geriatric Center, University of Heidelberg, Heidelberg, Germany.
authors.forename: Klaus
authors.initials: K
authors.lastname: Hauer
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Lord
authors.forename: Ulrich
authors.initials: U
authors.lastname: Lindemann
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Lamb
authors.forename: Kamiar
authors.initials: K
authors.lastname: Aminian
authors.forename: Michael
authors.initials: M
authors.lastname: Schwenk
mesh_terms: D000367:Age Factors; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology*; D003072:Cognition Disorders / Q000175:diagnosis* / Q000473:pathology; D004734:Energy Metabolism; D005240:Feasibility Studies; D015577:Geriatric Assessment; D006801:Humans; D011939:Mental Recall; D009043:Motor Activity / Q000502:physiology*; D011594:Psychometrics; D015203:Reproducibility of Results; D057185:Sedentary Behavior; D013223:Statistics as Topic; D011795:Surveys and Questionnaires