TY - JOUR
T1 - A multi-center international study on the spinal cord independence measure, version IV
T2 - Rasch psychometric validation
AU - Catz, Amiram
AU - Itzkovich, Malka
AU - Rozenblum, Rotem
AU - Elkayam, Keren
AU - Kfir, Adi
AU - Tesio, Luigi
AU - Chhabra, Harvinder Singh
AU - Michaeli, Dianne
AU - Zeilig, Gabi
AU - Engel-Haber, Einat
AU - Bizzarini, Emiliana
AU - Pilati, Claudio
AU - Stigliano, Salvatore
AU - Merafina, Marcella
AU - Del Popolo, Giulio
AU - Righi, Gabriele
AU - Bonavita, Jacopo
AU - Baroncini, Ilaria
AU - Liu, Nan
AU - Xing, Huayi
AU - Margalho, Paulo
AU - Campos, Ines
AU - Riberto, Marcelo
AU - Soeira, Thabata Pasquini
AU - Chandy, Bobeena
AU - Tharion, George
AU - Joshi, Mrinal
AU - Lemay, Jean François
AU - Laramée, Marie Thérèse
AU - Curran, Dorothyann
AU - Leiulfsrud, Annelie Schedin
AU - Sørensen, Linda
AU - Biering-Sorensen, Fin
AU - Poder, Henrik Hagen
AU - Kesiktas, Nur
AU - Burgess-Collins, Lisa
AU - Edwards, Jayne
AU - Osman, Aheed
AU - Bluvshtein, Vadim
N1 - Publisher Copyright:
© 2023 The Author(s). Published with license by Taylor & Francis Group, LLC.
PY - 2024
Y1 - 2024
N2 - Context: The Spinal Cord Independence Measure is a comprehensive functional rating scale for individuals with spinal cord lesion (SCL). Objective: To validate the scores of the three subscales of SCIM IV, the fourth version of SCIM, using advanced statistical methods. Study Design: Multi-center cohort study. Setting: Nineteen SCL units in 11 countries. Methods: SCIM developers created SCIM IV following comments by experts, included more accurate definitions of scoring criteria in the SCIM IV form, and adjusted it to assess specific conditions or situations that the third version, SCIM III, does not address. Professional staff members assessed 648 SCL inpatients, using SCIM IV and SCIM III, at admission to rehabilitation, and at discharge. The authors examined the validity and reliability of SCIM IV subscale scores using Rasch analysis. Results: The study included inpatients aged 16–87 years old. SCIM IV subscale scores fit the Rasch model. All item infit and most item outfit mean-square indices were below 1.4; statistically distinct strata of abilities were 2.6–6; most categories were properly ordered; item hierarchy was stable across most clinical subgroups and countries. In a few items, however, we found misfit or category threshold disordering. We found SCIM III and SCIM IV Rasch properties to be comparable. Conclusions: Rasch analysis suggests that the scores of each SCIM IV subscale are reliable and valid. This reinforces the justification for using SCIM IV in clinical practice and research.
AB - Context: The Spinal Cord Independence Measure is a comprehensive functional rating scale for individuals with spinal cord lesion (SCL). Objective: To validate the scores of the three subscales of SCIM IV, the fourth version of SCIM, using advanced statistical methods. Study Design: Multi-center cohort study. Setting: Nineteen SCL units in 11 countries. Methods: SCIM developers created SCIM IV following comments by experts, included more accurate definitions of scoring criteria in the SCIM IV form, and adjusted it to assess specific conditions or situations that the third version, SCIM III, does not address. Professional staff members assessed 648 SCL inpatients, using SCIM IV and SCIM III, at admission to rehabilitation, and at discharge. The authors examined the validity and reliability of SCIM IV subscale scores using Rasch analysis. Results: The study included inpatients aged 16–87 years old. SCIM IV subscale scores fit the Rasch model. All item infit and most item outfit mean-square indices were below 1.4; statistically distinct strata of abilities were 2.6–6; most categories were properly ordered; item hierarchy was stable across most clinical subgroups and countries. In a few items, however, we found misfit or category threshold disordering. We found SCIM III and SCIM IV Rasch properties to be comparable. Conclusions: Rasch analysis suggests that the scores of each SCIM IV subscale are reliable and valid. This reinforces the justification for using SCIM IV in clinical practice and research.
KW - Disability assessment
KW - Multi-center study
KW - Outcome measures
KW - Rasch analysis
KW - SCIM
KW - Spinal cord
UR - http://www.scopus.com/inward/record.url?scp=85152281551&partnerID=8YFLogxK
U2 - 10.1080/10790268.2023.2183334
DO - 10.1080/10790268.2023.2183334
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C2 - 37000427
AN - SCOPUS:85152281551
SN - 1079-0268
VL - 47
SP - 681
EP - 691
JO - Journal of Spinal Cord Medicine
JF - Journal of Spinal Cord Medicine
IS - 5
ER -