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Chorschew A, Kesgin F, Bellmann-Strobl J, Flachenecker P, Schiffmann I, Rosenthal F, Althoff P, Drebinger D, Arsenova R, Rasche L, Dorsch EM, Heesen C, Paul F, Stellmann JP, Schmitz-Hübsch T. Translation and validation of the multiple sclerosis walking scale 12 for the German population - the MSWS-12/D. Health Qual Life Outcomes 2023; 21:110. [PMID: 37814258 PMCID: PMC10563229 DOI: 10.1186/s12955-023-02190-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 09/12/2023] [Indexed: 10/11/2023] Open
Abstract
BACKGROUND Gait impairment is a relevant problem in persons with multiple sclerosis (pwMS). The Multiple Sclerosis Walking Scale 12 (MSWS-12) is a valid Patient Reported Outcome Measure (PROM) to evaluate walking ability in pwMS. The aim of this study was to provide a linguistically valid translation of MSWS-12 into German language (MSWS-12/D) and to evaluate its psychometric properties. METHODS The MSWS-12 was translated in a process modified from guidelines for the cross-cultural adaption of PROMs, and a pre-test was applied in a small sample of 20 pwMS to evaluate comprehensibility and acceptance. Psychometric properties (floor and ceiling effects, internal consistency, construct validity) were then assessed in 124 pwMS seen at academic MS centers. Construct validity was evaluated against Expanded Disability Status Scale (EDSS) and maximum gait speed in the Timed 25-Foot Walk (T25FW). RESULTS Although the sample covered a wide spectrum of symptom severity, the majority had rather low levels of disability (EDSS median 2.0) and 6.5% scored EDSS of 0. In this sample, MSWS-12/D showed floor effects (36% with score 0) and for internal consistency, a Cronbach's alpha of 0.98 was calculated. MSWS-12/D score showed a relevant correlation to EDSS (ρ = 0.73) and T25FW speed (r=-0.72). CONCLUSION We provide MSWS-12/D as a linguistically valid German version of MSWS-12. Psychometric properties (acceptance, floor and ceiling effects, internal consistency and construct validity) in pwMS were similar to those described for the original version. This indicates that MSWS-12/D can be applied as equivalent to the original version in German speaking pwMS. Results support the relevance of PROMs to capture patient perception of walking ability in addition to performance-based assessments such as maximum walking speed or maximum walking distance.
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Affiliation(s)
- Anna Chorschew
- Experimental and Clinical Research Center (ECRC), a cooperation between Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association and Charité - Universitätsmedizin Berlin, Lindenberger Weg 80, 13125, Berlin, Germany
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Firat Kesgin
- Institute of Neuroimmunology and Multiple Sclerosis (INIMS), Center for Molecular Neurobiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Judith Bellmann-Strobl
- Experimental and Clinical Research Center (ECRC), a cooperation between Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association and Charité - Universitätsmedizin Berlin, Lindenberger Weg 80, 13125, Berlin, Germany
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | | | - Insa Schiffmann
- Institute of Neuroimmunology and Multiple Sclerosis (INIMS), Center for Molecular Neurobiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Neurology, University Medical Centre Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Friederike Rosenthal
- Institute of Neuroimmunology and Multiple Sclerosis (INIMS), Center for Molecular Neurobiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Patrick Althoff
- Experimental and Clinical Research Center (ECRC), a cooperation between Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association and Charité - Universitätsmedizin Berlin, Lindenberger Weg 80, 13125, Berlin, Germany
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Daniel Drebinger
- Experimental and Clinical Research Center (ECRC), a cooperation between Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association and Charité - Universitätsmedizin Berlin, Lindenberger Weg 80, 13125, Berlin, Germany
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
- Department of Physical Medicine and Rehabilitation, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Radina Arsenova
- Experimental and Clinical Research Center (ECRC), a cooperation between Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association and Charité - Universitätsmedizin Berlin, Lindenberger Weg 80, 13125, Berlin, Germany
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
- Department of Pediatrics, St Joseph Krankenhaus Berlin-Tempelhof, Berlin, Germany
| | - Ludwig Rasche
- Department of Psychiatry, Schlosspark-Klinik Charlottenburg, Berlin, Germany
| | - Eva-Maria Dorsch
- Experimental and Clinical Research Center (ECRC), a cooperation between Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association and Charité - Universitätsmedizin Berlin, Lindenberger Weg 80, 13125, Berlin, Germany
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
- Department of Neurology, Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Christoph Heesen
- Institute of Neuroimmunology and Multiple Sclerosis (INIMS), Center for Molecular Neurobiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Neurology, University Medical Centre Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Friedemann Paul
- Experimental and Clinical Research Center (ECRC), a cooperation between Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association and Charité - Universitätsmedizin Berlin, Lindenberger Weg 80, 13125, Berlin, Germany
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
- Neuroscience Clinical Research Center, Charité - Universitätsmedizin Berlin, Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
- Department of Neurology, Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Jan-Patrick Stellmann
- Aix-Marseille Univ, CNRS, CRMBM, UMR 7339; APHM La Timone, CEMEREM, Marseille, France
- APHM, Hospital de la Timone, CEMEREM, Marseille, France
| | - Tanja Schmitz-Hübsch
- Experimental and Clinical Research Center (ECRC), a cooperation between Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association and Charité - Universitätsmedizin Berlin, Lindenberger Weg 80, 13125, Berlin, Germany.
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany.
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany.
- Neuroscience Clinical Research Center, Charité - Universitätsmedizin Berlin, Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany.
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Fofana F, Bazeley P, Regnault A. Applying a mixed methods design to test saturation for qualitative data in health outcomes research. PLoS One 2020; 15:e0234898. [PMID: 32559246 PMCID: PMC7304618 DOI: 10.1371/journal.pone.0234898] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 06/04/2020] [Indexed: 11/30/2022] Open
Abstract
Saturation, a core concept in qualitative research, suggests when data collection might end. It is reached when no new relevant information emerges with additional interviews. The aim of this research was to explore whether a mixed methods design could contribute to the demonstration of saturation. Firstly, saturation was conceptualized mathematically using set theory. Secondly, a conversion mixed design was conducted: a set of codes derived from qualitative interviews were quantitized and analyzed using partial least squares (PLS) regression to document whether saturation was reached. A qualitative study conducted by other researchers prior to this work (i.e. none of the present authors was involved in this study) was used to test saturation using PLS regression. This illustrative qualitative study aimed to investigate the impact of Clostridium difficile infection (CDI) on nurses' work in the hospital and the results were published elsewhere (Guillemin et al. 2015). Semi-structured interviews were conducted with 12 nurses. Saturation was characterized by the cumulative percentage of variability accounted for by PLS factors. After 12 interviews, this percentage was 51% which suggests that saturation was achieved at least on main themes. Two main themes identifying similarities in the experience of nurses caring for patients with CDI were identified: Organization/Coordination of the working day and Time-consuming work. Although dependent on the coding of qualitative data, PLS regression of quantitized data from qualitative interviews generated useful information for the determination of saturation.
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Affiliation(s)
- Fatoumata Fofana
- Patient-Centered Outcomes, ICON plc, Lyon, France
- UMR INSERM 1246, SPHERE « methodS in Patients-centered outcomes and HEalth ResEarch », University of Nantes, University of Tours, Nantes, France
| | - Pat Bazeley
- Western Sydney University, Sydney, Australia
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Brogårdh C, Lexell J, Westergren A. Psychometric Properties of the Walking Impact Scale (Walk-12) in Persons with Late Effects of Polio. PM R 2020; 13:297-306. [PMID: 32410316 DOI: 10.1002/pmrj.12403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 05/01/2020] [Accepted: 05/06/2020] [Indexed: 11/05/2022]
Abstract
BACKGROUND Many persons with late effects of polio (LEoP) perceive walking limitations in everyday life. A common rating scale to assess walking limitations is the Walking Impact Scale (Walk-12). However, there is limited knowledge about its psychometric properties. OBJECTIVE To investigate the psychometric properties of Walk-12 in persons with LEoP. DESIGN Rasch model analysis of cross-sectional data. SETTING University hospital. PARTICIPANTS A total of 325 persons with LEoP (175 women; mean age 70 ± 10 years). MAIN OUTCOME MEASUREMENT The Walk-12, comprising 12 items with five response categories ranging from 1 (not at all) to 5 (extremely). METHODS Data of Walk-12 were collected by a postal survey. The Rasch model analysis was used to analyze unidimensionality of the scale, local dependency, targeting, hierarchical order of items, Differential Item Functioning (DIF), response category functioning, and reliability (Person Separation Index, PSI). Raw score transformation to interval measurements was also performed. RESULTS The analysis revealed that Walk-12 was multidimensional and suffered from some local dependency. Targeting was compromised among persons with less and more walking limitations. Hierarchically, the most difficult item to perform was "running" and the easiest was "walking indoors with support". There was a minor DIF for gender in one item ("support when walking outdoors"). Reliability was high (PSI = 0.94). Disordered response category thresholds were found for three items; when merging the middle response categories for these items model fit slightly improved and unidimensionality was achieved. CONCLUSIONS The Walk-12, in its current version, does not fully meet the rigorous psychometric Rasch measurement standards in persons with LEoP. Further development of the scale is warranted, including merging response categories and complementing Walk-12 with objective measures of gait in order to improve targeting. As these limitations can be considered minor, the current version of Walk-12 can still be useful for research and clinical practice.
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Affiliation(s)
- Christina Brogårdh
- Department of Health Sciences, Lund University, Lund, Sweden.,Department of Neurology, Rehabilitation Medicine, Memory Disorders and Geriatrics, Skåne University Hospital, Lund, Sweden
| | - Jan Lexell
- Department of Health Sciences, Lund University, Lund, Sweden.,Department of Neurology, Rehabilitation Medicine, Memory Disorders and Geriatrics, Skåne University Hospital, Lund, Sweden
| | - Albert Westergren
- Department of Health Sciences, Lund University, Lund, Sweden.,The Research Platform for Collaboration for Health, and The PRO-CARE Group, Faculty of Health Sciences, Kristianstad University, Kristianstad, Sweden
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