Stephanie Hiser1,2, Amy Toonstra3, Lisa A Friedman2,4, Elizabeth Colantuoni2,5, Dale M Needham2,4,6. 1. Department of Physical Medicine and Rehabilitation, The Johns Hopkins Hospital, Baltimore, Maryland, USA. 2. Outcomes After Critical Illness and Surgery (OACIS) Group, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. 3. Department of Physical Therapy, Concordia University, St. Paul, Minnesota, USA. 4. Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. 5. Department of Biostatistics, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA. 6. Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
Abstract
OBJECTIVE: Examine the inter-rater reliability of the activity measure for post-acute care (AM-PAC) inpatient mobility short form (IMSF) when completed by physical therapists (PTs), during routine clinical practice, in a variety of patients with critical illness. METHODS: A prospective observational evaluation at single, large academic hospital in the United States. Patients (n = 76) in surgical, medical and neurological intensive care units (ICUs) were evaluated as part of routine clinical practice using the AM-PAC IMSF administered by eight PTs with at least 6 months of experience using this tool. One of two reference rater PTs observed the physical therapy session, and simultaneously scored the AM-PAC IMSF. The reference rater and clinical PTs were blinded to each other's scores with a minimum of 10 assessments completed by each clinical PT. Bland-Altman plots were constructed and intra-class correlation coefficients (ICC) were computed using a random intercept (physical therapy session) model. RESULTS: Eighty one assessments (five patients assessed twice) were scored by both a clinical PT and reference rater PT (total assessments = 162). Bland-Altman plots revealed a mean difference in AM-PAC IMSF scoring of 0.0 (95% limits of agreement: -3.0 to +3.0), with an ICC (95% confidence interval) of 0.957 (0.947-0.964). The ICC (95% confidence interval) for patients in surgical, medical and neurological ICUs was very similar: 0.949 (0.927-0.959), 0.963 (0.946-0.971) and 0.936 (0.886-0.955), respectively. CONCLUSIONS: The AM-PAC IMSF demonstrates excellent reliability compared with reference rater PTs when performed by PTs during clinical care across surgical, medical and neurological ICUs.
OBJECTIVE: Examine the inter-rater reliability of the activity measure for post-acute care (AM-PAC) inpatient mobility short form (IMSF) when completed by physical therapists (PTs), during routine clinical practice, in a variety of patients with critical illness. METHODS: A prospective observational evaluation at single, large academic hospital in the United States. Patients (n = 76) in surgical, medical and neurological intensive care units (ICUs) were evaluated as part of routine clinical practice using the AM-PAC IMSF administered by eight PTs with at least 6 months of experience using this tool. One of two reference rater PTs observed the physical therapy session, and simultaneously scored the AM-PAC IMSF. The reference rater and clinical PTs were blinded to each other's scores with a minimum of 10 assessments completed by each clinical PT. Bland-Altman plots were constructed and intra-class correlation coefficients (ICC) were computed using a random intercept (physical therapy session) model. RESULTS: Eighty one assessments (five patients assessed twice) were scored by both a clinical PT and reference rater PT (total assessments = 162). Bland-Altman plots revealed a mean difference in AM-PAC IMSF scoring of 0.0 (95% limits of agreement: -3.0 to +3.0), with an ICC (95% confidence interval) of 0.957 (0.947-0.964). The ICC (95% confidence interval) for patients in surgical, medical and neurological ICUs was very similar: 0.949 (0.927-0.959), 0.963 (0.946-0.971) and 0.936 (0.886-0.955), respectively. CONCLUSIONS: The AM-PAC IMSF demonstrates excellent reliability compared with reference rater PTs when performed by PTs during clinical care across surgical, medical and neurological ICUs.
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