Large-scale psychometric assessment and validation of the Modified COVID-19 Yorkshire Rehabilitation Scale C19-YRSm patient-reported outcome measure for Long COVID or Post-COVID syndrome
Mike Horton; Adam Smith; Stephen Halpin; Ruairidh Milne; Darren Winch; Clare Rayner; Roman Rocha Lawrence; Darren Greenwood; Nawar Barkley; Rachael Evans; Joseph Kwon; helen dawes; Connor Wood; Paul Wiliams; Harsha Master; Mae Mansoubi; Mir Ghazala; Johannes De Kock; Jordan Mullard; Mike Ormerod; Stavros Petrou; Daryl O'Connor; Rory O'Connor; Manoj Sivan
BACKGROUND
The C19-YRS was the first condition-specific scale for Long COVID/Post-COVID syndrome. Although the original C19-YRS evolved to the modified version (C19-YRSm) based on psychometric evidence, clinical content relevance and feedback from patients and healthcare professionals, it has not been validated through Rasch analysis.
OBJECTIVES
To psychometrically assess and validate the C19-YRSm using newly collected data from a large-scale, multi-centre study (LOCOMOTION).
METHODS
1278 patients (67% Female; mean age = 48.6, SD 12.7) digitally completed the C19-YRSm. The psychometric properties of the C19-YRSm Symptom Severity (SS) and Functional Disability (FD) subscales were assessed using a Rasch Measurement Theory framework, assessing for individual item model fit, targeting, internal consistency reliability, unidimensionality, local dependency (LD), response category functioning and differential item functioning (DIF) by age group, sex and ethnicity.
RESULTS
Rasch analysis revealed robust psychometric properties of both subscales, with each demonstrating unidimensionality, appropriate response category structuring, no floor or ceiling effects, and minimal LD and DIF. Both subscales also displayed good targeting and reliability (SS: Person Separation Index (PSI)=0.81, Cronbach alpha=0.82; FD: PSI=0.76, Cronbach alpha=0.81).
CONCLUSION
Although some minor anomalies are apparent, the modifications to the original C19-YRS have strengthened its measurement characteristics, and its clinical and conceptual relevance.
Link | PDF | Preprint: MedRxiv [Open Access]
Mike Horton; Adam Smith; Stephen Halpin; Ruairidh Milne; Darren Winch; Clare Rayner; Roman Rocha Lawrence; Darren Greenwood; Nawar Barkley; Rachael Evans; Joseph Kwon; helen dawes; Connor Wood; Paul Wiliams; Harsha Master; Mae Mansoubi; Mir Ghazala; Johannes De Kock; Jordan Mullard; Mike Ormerod; Stavros Petrou; Daryl O'Connor; Rory O'Connor; Manoj Sivan
BACKGROUND
The C19-YRS was the first condition-specific scale for Long COVID/Post-COVID syndrome. Although the original C19-YRS evolved to the modified version (C19-YRSm) based on psychometric evidence, clinical content relevance and feedback from patients and healthcare professionals, it has not been validated through Rasch analysis.
OBJECTIVES
To psychometrically assess and validate the C19-YRSm using newly collected data from a large-scale, multi-centre study (LOCOMOTION).
METHODS
1278 patients (67% Female; mean age = 48.6, SD 12.7) digitally completed the C19-YRSm. The psychometric properties of the C19-YRSm Symptom Severity (SS) and Functional Disability (FD) subscales were assessed using a Rasch Measurement Theory framework, assessing for individual item model fit, targeting, internal consistency reliability, unidimensionality, local dependency (LD), response category functioning and differential item functioning (DIF) by age group, sex and ethnicity.
RESULTS
Rasch analysis revealed robust psychometric properties of both subscales, with each demonstrating unidimensionality, appropriate response category structuring, no floor or ceiling effects, and minimal LD and DIF. Both subscales also displayed good targeting and reliability (SS: Person Separation Index (PSI)=0.81, Cronbach alpha=0.82; FD: PSI=0.76, Cronbach alpha=0.81).
CONCLUSION
Although some minor anomalies are apparent, the modifications to the original C19-YRS have strengthened its measurement characteristics, and its clinical and conceptual relevance.
Link | PDF | Preprint: MedRxiv [Open Access]