Structural validity of the foot and ankle outcome score for orthopaedic pathologies with Rasch Measurement Theory

Krista Tapaninaho; Antti J. Saarinen; Outi Ilves; Mikko M. Uimonen; Arja H. Häkkinen; Henrik Sandelin; Jussi P. Repo

doi:10.1016/j.fas.2021.03.005

Structural validity of the foot and ankle outcome score for orthopaedic pathologies with Rasch Measurement Theory

Krista Tapaninaho, Antti J. Saarinen, Outi Ilves, Mikko M. Uimonen, Arja H. Häkkinen, Henrik Sandelin, Jussi P. Repo

Research output: Contribution to journal › Article › peer-review

Abstract

Background: The Foot and Ankle Outcome Score (FAOS) is one of the most frequently used patient-reported outcome measures for foot and ankle conditions. The aim is to test the structural validity of the Finnish version of the FAOS using Rasch Measurement Theory. Methods: FAOS scores were obtained from 218 consecutive patients who received operative treatment for foot and ankle conditions. The FAOS data were fitted into the Rasch model and person separation index (PSI) calculated. Results: All the five subscales provided good coverage and targeting. Three subscales presented unidimensional structure. Thirty-eight of the 42 items had ordered response category thresholds. Three of the 42 items had differential item functioning towards gender. All subscales showed sufficient fit to the Rasch model. PSI ranged from 0.73 to 0.94 for the subscales. Conclusions: The Finnish version of the FAOS shows acceptable structural validity for assessing complaints in orthopaedic foot and ankle patients.

Original language	English
Journal	FOOT AND ANKLE SURGERY
DOIs	https://doi.org/10.1016/j.fas.2021.03.005
Publication status	E-pub ahead of print - 16 Mar 2021
Publication type	A1 Journal article-refereed

Keywords

Psychometric properties
Quality of life
Validity

Publication forum classification

Publication forum level 1

ASJC Scopus subject areas

Orthopedics and Sports Medicine

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10.1016/j.fas.2021.03.005Licence: CC BY-NC-ND

1-s2.0-S1268773121000424-mainFinal published version, 1.67 MBLicence: CC BY-NC-ND

https://urn.fi/URN:NBN:fi:tuni-202204053045Licence: CC BY-NC-ND

Cite this

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title = "Structural validity of the foot and ankle outcome score for orthopaedic pathologies with Rasch Measurement Theory",

abstract = "Background: The Foot and Ankle Outcome Score (FAOS) is one of the most frequently used patient-reported outcome measures for foot and ankle conditions. The aim is to test the structural validity of the Finnish version of the FAOS using Rasch Measurement Theory. Methods: FAOS scores were obtained from 218 consecutive patients who received operative treatment for foot and ankle conditions. The FAOS data were fitted into the Rasch model and person separation index (PSI) calculated. Results: All the five subscales provided good coverage and targeting. Three subscales presented unidimensional structure. Thirty-eight of the 42 items had ordered response category thresholds. Three of the 42 items had differential item functioning towards gender. All subscales showed sufficient fit to the Rasch model. PSI ranged from 0.73 to 0.94 for the subscales. Conclusions: The Finnish version of the FAOS shows acceptable structural validity for assessing complaints in orthopaedic foot and ankle patients.",

keywords = "Psychometric properties, Quality of life, Validity",

author = "Krista Tapaninaho and Saarinen, {Antti J.} and Outi Ilves and Uimonen, {Mikko M.} and H{\"a}kkinen, {Arja H.} and Henrik Sandelin and Repo, {Jussi P.}",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = mar,

day = "16",

doi = "10.1016/j.fas.2021.03.005",

language = "English",

journal = "FOOT AND ANKLE SURGERY",

issn = "1268-7731",

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TY - JOUR

T1 - Structural validity of the foot and ankle outcome score for orthopaedic pathologies with Rasch Measurement Theory

AU - Tapaninaho, Krista

AU - Saarinen, Antti J.

AU - Ilves, Outi

AU - Uimonen, Mikko M.

AU - Häkkinen, Arja H.

AU - Sandelin, Henrik

AU - Repo, Jussi P.

PY - 2021/3/16

Y1 - 2021/3/16

N2 - Background: The Foot and Ankle Outcome Score (FAOS) is one of the most frequently used patient-reported outcome measures for foot and ankle conditions. The aim is to test the structural validity of the Finnish version of the FAOS using Rasch Measurement Theory. Methods: FAOS scores were obtained from 218 consecutive patients who received operative treatment for foot and ankle conditions. The FAOS data were fitted into the Rasch model and person separation index (PSI) calculated. Results: All the five subscales provided good coverage and targeting. Three subscales presented unidimensional structure. Thirty-eight of the 42 items had ordered response category thresholds. Three of the 42 items had differential item functioning towards gender. All subscales showed sufficient fit to the Rasch model. PSI ranged from 0.73 to 0.94 for the subscales. Conclusions: The Finnish version of the FAOS shows acceptable structural validity for assessing complaints in orthopaedic foot and ankle patients.

AB - Background: The Foot and Ankle Outcome Score (FAOS) is one of the most frequently used patient-reported outcome measures for foot and ankle conditions. The aim is to test the structural validity of the Finnish version of the FAOS using Rasch Measurement Theory. Methods: FAOS scores were obtained from 218 consecutive patients who received operative treatment for foot and ankle conditions. The FAOS data were fitted into the Rasch model and person separation index (PSI) calculated. Results: All the five subscales provided good coverage and targeting. Three subscales presented unidimensional structure. Thirty-eight of the 42 items had ordered response category thresholds. Three of the 42 items had differential item functioning towards gender. All subscales showed sufficient fit to the Rasch model. PSI ranged from 0.73 to 0.94 for the subscales. Conclusions: The Finnish version of the FAOS shows acceptable structural validity for assessing complaints in orthopaedic foot and ankle patients.

KW - Psychometric properties

KW - Quality of life

KW - Validity

U2 - 10.1016/j.fas.2021.03.005

DO - 10.1016/j.fas.2021.03.005

M3 - Article

AN - SCOPUS:85103062828

JO - FOOT AND ANKLE SURGERY

JF - FOOT AND ANKLE SURGERY

SN - 1268-7731

ER -

Structural validity of the foot and ankle outcome score for orthopaedic pathologies with Rasch Measurement Theory

Abstract

Keywords

Publication forum classification

ASJC Scopus subject areas

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