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    The ICU Mobility Scale Has Construct and Predictive Validity and Is Responsive A Multicenter Observational Study

    Access Status
    Fulltext not available
    Authors
    Tipping, C.
    Bailey, M.
    Bellomo, R.
    Berney, S.
    Buhr, H.
    Denehy, L.
    Harrold, Megan
    Holland, A.
    Higgins, A.
    Iwashyna, T.
    Needham, D.
    Presneill, J.
    Saxena, M.
    Skinner, E.
    Webb, S.
    Young, P.
    Zanni, J.
    Hodgson, C.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Tipping, C. and Bailey, M. and Bellomo, R. and Berney, S. and Buhr, H. and Denehy, L. and Harrold, M. et al. 2016. The ICU Mobility Scale Has Construct and Predictive Validity and Is Responsive. A Multicenter Observational Study. Annals of the American Thoracic Society. 13 (6): pp. 887-893.
    Source Title
    Annals of the American Thoracic Society
    DOI
    10.1513/AnnalsATS.201510-717OC
    ISSN
    2325-6621
    School
    School of Physiotherapy and Exercise Science
    URI
    http://hdl.handle.net/20.500.11937/19152
    Collection
    • Curtin Research Publications
    Abstract

    Rationale: The ICU Mobility Scale (IMS) is a measure of mobility milestones in critically ill patients. Objectives: This study aimed to determine the validity and responsiveness of the IMS from a prospective cohort study of adults admitted to the intensive care unit (ICU). Methods: Construct and predictive validity were assessed by comparing IMS values at ICU discharge in 192 patients to other variables using Spearman rank correlation coefficient, Mann-Whitney U tests, and logistic regression. Responsiveness was assessed using change over time, effect size, floor and ceiling effects, and percentage of patients showing change. Measurements and Main Results: The IMS at ICU discharge demonstrated a moderate correlation with muscle strength (r = 0.64, P < 0.001). There was a significant difference between the IMS at ICU discharge in patients with ICU-acquired weakness (median, 4.0; interquartile range, 3.0–5.0) compared with patients without (median, 8.0; interquartile range, 5.0–8.0; P < 0.001). Increasing IMS values at ICU discharge were associated with survival to 90 days (odds ratio [OR], 1.38; 95% confidence interval [CI], 1.14–1.66) and discharge home (OR, 1.16; 95% CI, 1.02–1.32) but not with return to work at 6 months (OR, 1.09; 95% CI, 0.92–1.28). The IMS was responsive with a significant change from study enrolment to ICU discharge (d = 0.8, P < 0.001), with IMS values increasing in 86% of survivors during ICU admission. No substantial floor (14% scored 0) or ceiling (4% scored 10) effects were present at ICU discharge. Conclusions: Our findings support the validity and responsiveness of the IMS as a measure of mobility in the ICU.

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