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

Marielle P Jans, Vera C Slootweg, Cecile R Boot, Natalie A de Morton, Geert van der Sluis, Nico L van Meeteren

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)1892-9
Number of pages8
JournalArchives of Physical Medicine and Rehabilitation
Volume92
Issue number11
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

Keywords

  • activities of daily living
  • aged, 80 and over
  • cross-sectional studies
  • disability evaluation
  • female
  • humans
  • male
  • Netherlands
  • observer variation
  • osteoarthritis, hip/physiopathology
  • osteoarthritis, knee/physiopathology
  • physical therapy modalities
  • reproducibility of results
  • translating

Fingerprint

Dive into the research topics of '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'. Together they form a unique fingerprint.

Cite this