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The reliability and validity of measures of gait variability in community-dwelling older adults.
Tuesday,2012-11-06 12:10 America/Los_Angeles — eenright
| Title | The reliability and validity of measures of gait variability in community-dwelling older adults. |
| Publication Type | Journal Article |
| Year of Publication | 2008 |
| Authors | Brach, JS, Perera, S, Studenski, S, Newman, AB |
| Journal | Arch Phys Med Rehabil |
| Volume | 89 |
| Issue | 12 |
| Pagination | 2293-6 |
| Date Published | 2008 Dec |
| ISSN | 1532-821X |
| Keywords | Activities of Daily Living, Aged, Cross-Sectional Studies, Disability Evaluation, Exercise, Female, Gait, Health Status, Humans, Male, Pennsylvania, Rehabilitation, Reproducibility of Results |
| Abstract | <p><b>OBJECTIVE: </b>To examine the test-retest reliability and concurrent validity of variability of gait characteristics.</p><p><b>DESIGN: </b>Cross-sectional study.</p><p><b>SETTING: </b>Research laboratory.</p><p><b>PARTICIPANTS: </b>Older adults (N=558) from the Cardiovascular Health Study.</p><p><b>INTERVENTIONS: </b>Not applicable.</p><p><b>MAIN OUTCOME MEASURES: </b>Gait characteristics were measured using a 4-m computerized walkway. SD determined from the steps recorded were used as the measures of variability. Intraclass correlation coefficients (ICC) were calculated to examine test-retest reliability of a 4-m walk and two 4-m walks. To establish concurrent validity, the measures of gait variability were compared across levels of health, functional status, and physical activity using independent t tests and analysis of variances.</p><p><b>RESULTS: </b>Gait variability measures from the two 4-m walks demonstrated greater test-retest reliability than those from the single 4-m walk (ICC=.22-.48 and ICC=.40-.63, respectively). Greater step length and stance time variability were associated with poorer health, functional status and physical activity (P<.05).</p><p><b>CONCLUSIONS: </b>Gait variability calculated from a limited number of steps has fair to good test-retest reliability and concurrent validity. Reliability of gait variability calculated from a greater number of steps should be assessed to determine if the consistency can be improved.</p> |
| DOI | 10.1016/j.apmr.2008.06.010 |
| Alternate Journal | Arch Phys Med Rehabil |
| PubMed ID | 19061741 |
| PubMed Central ID | PMC2705958 |
| Grant List | K23 AG026766-01 / AG / NIA NIH HHS / United States P30 AG024827 / AG / NIA NIH HHS / United States K23 AG026766-04 / AG / NIA NIH HHS / United States HL 87082 / HL / NHLBI NIH HHS / United States HL 87083 / HL / NHLBI NIH HHS / United States P30 AG024827-01 / AG / NIA NIH HHS / United States N01 HC085081 / HC / NHLBI NIH HHS / United States TG32 AG00181 / AG / NIA NIH HHS / United States N01 HC075150 / HC / NHLBI NIH HHS / United States N01-HC-85081 / HC / NHLBI NIH HHS / United States N01 HC085083 / HC / NHLBI NIH HHS / United States HL 87080 / HL / NHLBI NIH HHS / United States N01 HC085085 / HC / NHLBI NIH HHS / United States T32 AG000181-09 / AG / NIA NIH HHS / United States HL 87081 / HL / NHLBI NIH HHS / United States HL 87084 / HL / NHLBI NIH HHS / United States N01 HC085082 / HC / NHLBI NIH HHS / United States N01-HC-85082 / HC / NHLBI NIH HHS / United States N01 HC085080 / HC / NHLBI NIH HHS / United States K23 AG026766 / AG / NIA NIH HHS / United States HL 87086 / HL / NHLBI NIH HHS / United States T32 AG000181 / AG / NIA NIH HHS / United States N01-HC-85083 / HC / NHLBI NIH HHS / United States N01-HC-75150 / HC / NHLBI NIH HHS / United States K23 AG026766-03 / AG / NIA NIH HHS / United States N01-HC-85080 / HC / NHLBI NIH HHS / United States N01 HC085084 / HC / NHLBI NIH HHS / United States HL 87085 / HL / NHLBI NIH HHS / United States N01HC75150 / HL / NHLBI NIH HHS / United States K23 AG026766-02 / AG / NIA NIH HHS / United States N01-HC-85079 / HC / NHLBI NIH HHS / United States N01HC85079 / HL / NHLBI NIH HHS / United States N01 HC085079 / HC / NHLBI NIH HHS / United States N01 HC045133 / HC / NHLBI NIH HHS / United States HL 87079 / HL / NHLBI NIH HHS / United States |