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Journal of Aging Research
Volume 2012, Article ID 353252, 7 pages
Research Article

The de Morton Mobility Index: Normative Data for a Clinically Useful Mobility Instrument

1Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC, Canada V5Z 1M9
2Department of Physiotherapy, Monash University, Melbourne, VIC 3800, Australia
3Department of Family Practice, University of British Columbia, Vancouver, BC, Canada V6T 1Z4

Received 19 April 2012; Accepted 14 July 2012

Academic Editor: Richard D. Semba

Copyright © 2012 E. M. Macri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Determining mobility status is an important component of any health assessment for older adults. In order for a mobility measure to be relevant and meaningful, normative data are required for comparison to a healthy reference population. The DEMMI is the first mobility instrument to measure mobility across the spectrum from bed bound to functional levels of independent mobility. In this cross-sectional observational study, normative data were obtained for the DEMMI from a population of 183 healthy, community-dwelling adults age 60+ who resided in Vancouver, Canada and Melbourne, Australia. Older age categories had significantly lower DEMMI mobility mean scores ( 𝑃 < 0 . 0 5 ), as did individuals who walked with a mobility aid or lived in semi-independent living (assisted living or retirement village), whereas DEMMI scores did not differ by sex ( 𝑃 = 0 . 4 9 ) or reported falls history ( 𝑃 = 0 . 2 1 ). Normative data for the DEMMI mobility instrument provides vital reference scores to facilitate its use across the mobility spectrum in clinical, research, and policymaking settings.