Reproducibility and validity of the Dutch translation of the de Morton Mobility Index (DEMMI) used by physiotherapists in older patients with knee or Hip osteoarthritis
article
Objective: To examine the reproducibility, construct validity, and unidimensionality of the Dutch translation of the de Morton Mobility Index (DEMMI), a performance-based measure of mobility for older patients. Design: Cross-sectional study. Setting: Rehabilitation center (reproducibility study) and hospital (validity study). Participants: Patients (N=28; age >65y) after orthopedic surgery (reproducibility study) and patients (N=219; age >65y) waiting for total hip or total knee arthroplasty (validity study). Intervention: Not applicable. Main Outcome Measures: Not applicable. Results: The intraclass correlation coefficient for interrater reliability was high (.85; 95% confidence interval, 71.93), and minimal detectable change with 90% confidence was 7 on the 100-point DEMMI scale. Rasch analysis identified that the Dutch translation of the DEMMI is a unidimensional measure of mobility in this population. DEMMI scores showed high correlations with scores on other performance-based measures of mobility (Timed Up and Go test, Spearman r=-.73; Chair Rise Time, r=-.69; walking test, r=.74). A lower correlation of.44 was identified with the self-report measure Western Ontario and McMaster Universities Osteoarthritis Index. Conclusions: The Dutch translation of the DEMMI is a reproducible and valid performance-based measure for assessing mobility in older patients with knee or hip osteoarthritis. © 2011 American Congress of Rehabilitation Medicine.
Topics
Activities of daily livingAgedGeriatric assessmentMobility limitationRehabilitationReproducibility of resultsagedarticleclinical articleclinical practiceconstruct validitycross-sectional studyde Morton mobility indexfemalehip osteoarthritishumaninterrater reliabilityknee osteoarthritismaleorthopedic surgerypatient mobilityperformancephysiotherapistrating scalereproducibilityself reporttotal hip prosthesistotal knee replacement
TNO Identifier
442980
ISSN
00039993
Source
Archives of Physical Medicine and Rehabilitation, 92(11), pp. 1892-1899.
Pages
1892-1899
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