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.
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.
Authors: T Braun; R-J Schulz; M Hoffmann; J Reinke; L Tofaute; C Urner; H Krämer; T Bock; N de Morton; C Grüneberg Journal: Z Gerontol Geriatr Date: 2015-02 Impact factor: 1.281
Authors: G van der Sluis; R A Goldbohm; R Bimmel; F Galindo Garre; J Elings; T J Hoogeboom; N L U van Meeteren Journal: Biomed Res Int Date: 2015-04-16 Impact factor: 3.411
Authors: Tobias Braun; Ralf-Joachim Schulz; Julia Reinke; Nico L van Meeteren; Natalie A de Morton; Megan Davidson; Christian Thiel; Christian Grüneberg Journal: BMC Geriatr Date: 2015-05-03 Impact factor: 3.921