Validity and reliability of the de Morton Mobility Index in the subacute hospital setting in a geriatric evaluation and management population
Natalie A. de Morton, Kylie Lane
Objective: To investigate the clinimetric properties of the de Morton Mobility Index (DEMMI) in a Geriatric Evaluation and Management (GEM) population.
Design: A longitudinal validation study (n = 100) and inter-rater reliability study (n = 29) in a GEM population.
Patients: Consecutive patients admitted to a GEM rehabilitation ward were eligible for inclusion.
Methods: At hospital admission and discharge, a physical therapist assessed patients with physical performance instruments that included the 6-metre walk test, step test, Clinical Test of Sensory Organization and Balance, Timed Up and Go test, 6-minute walk test and the DEMMI. Consecutively eligible patients were included in an inter-rater reliability study between physical therapists.
Results: DEMMI admission scores were normally distributed (mean 30.2, standard deviation 16.7) and other activity limitation instruments had either a floor or a ceiling effect. Evidence of convergent, discriminant and known groups validity for the DEMMI were obtained. The minimal detectable change with 90% confidence was 10.5 (95% confidence interval 6.1–17.9) points and the minimally clinically important difference was 8.4 points on the 100-point interval DEMMI scale.
Conclusion: The DEMMI provides clinicians with an accurate and valid method of measuring mobility for geriatric patients in the subacute hospital setting.
Do you want to comment on this paper? The comments will show up here and if appropriate the comments will also separately be forwarded to the authors.
You need to login/create an account to comment on articles. Click here to login/create an account