Assessing the Measurement Properties of the Fitbit Zip® Among Adults Living With HIV
| Autor: | Matthieu Dagenais, Nancy M. Salbach, Kelly K O'Brien, Dina Brooks |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Male
medicine.medical_specialty Intraclass correlation Human immunodeficiency virus (HIV) Physical activity Monitoring Ambulatory HIV Infections medicine.disease_cause 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation medicine Criterion validity Humans Orthopedics and Sports Medicine 030212 general & internal medicine Exercise Construct validity Reproducibility of Results 030229 sport sciences Middle Aged Preferred walking speed Cross-Sectional Studies Walk test Visual Count Female Self Report Psychology |
| Zdroj: | Journal of physical activityhealth. 17(3) |
| ISSN: | 1543-5474 |
| Popis: | Purpose: To assess the criterion and construct validity of the Fitbit Zip®to measure physical activity among adults living with HIV.Methods: Participants were video recorded completing 2 walk tests while wearing the Fitbit Zip®and completed 3 self-reported physical activity questionnaires 1 week later. The authors calculated intraclass correlation coefficients (ICCs) to determine agreement between the number of steps taken and distance walked (Fitbit Zip®) with the visual count of number of steps taken and actual distance walked (walk tests). The authors tested 15 a priori hypotheses about predicted associations between questionnaire scores and physical activity measured by the Fitbit Zip®.Results: Among the 34 participants, there was “excellent” agreement between the number of steps taken measured by the Fitbit Zip®and visually counted number of steps taken (ICC = .99) and number of steps taken at slow (ICC = .75), moderate (ICC = .85), and fast (ICC = .78) walking speeds. There was “poor” agreement between the Fitbit Zip®recorded distance and actual determined distance walked (ICC = .20). Three (20%) construct validity hypotheses were confirmed.Conclusions: The Fitbit Zip®demonstrated criterion validity for its ability to measure number of steps taken but not distance walked, and did not demonstrate construct validity for measuring physical activity among adults with HIV. |
| Databáze: | OpenAIRE |
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