TY - JOUR
T1 - The Rhinoplasty Rosetta Stone
T2 - Using Rasch Analysis to Create and Validate Crosswalks between the NOSE and the SCHNOS Functional Subscale
AU - van Zijl, Floris V.W.J.
AU - Declau, Frank
AU - Rizopoulos, Dimitris
AU - Datema, Frank R.
N1 - Publisher Copyright:
Copyright © 2024 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of the American Society of Plastic Surgeons.
PY - 2024/11
Y1 - 2024/11
N2 - BACKGROUND: The Nasal Obstruction Symptom Evaluation (NOSE) and the Functional subscale of the Standardized Cosmesis and Health Nasal Outcomes Survey (SCHNOS-O) are widely used patient-reported outcome measures to measure functional outcomes of rhinoplasty. However, as different instruments produce scores on different metrics, results of these instruments cannot be linked directly, thus hindering comparison and aggregating of rhinoplasty outcome data from practices using either instrument. The aim of this study was to develop and validate crosswalks between the NOSE and the SCHNOS-O.METHODS:In a sample of 552 rhinoplasty patients who completed both instruments, the NOSE and SCHNOS-O scales were co-calibrated onto a common interval-scaled metric using Rasch analysis. Separate Rasch models were run per instrument, and the latent constructs were estimated using the calibrated item parameters. By anchoring original patient-reported outcome measure scores of both instruments to this Rasch computed measurement scale, the scores of both instruments were linked. A second independent sample was used to validate the created crosswalks. RESULTS: Total scores on the NOSE and SCHNOS-O were strongly correlated. The Rasch-based co-calibration of the NOSE and SCHNOS-O items resulted in a model that adequately fitted the data. Back-and-forth crosswalk tables were created from the NOSE to the SCHNOS-O. For patients with moderate nasal obstruction, predicted SCHNOS-O scores were slightly higher for a given level of the NOSE. Intraclass correlation coefficients between predicted and actual scores were 0.93 for both directions, indicating adequate agreement for group-level comparisons. CONCLUSIONS: This study developed and validated Rasch-based crosswalks from the NOSE to the SCHNOS-O and vice versa. The provided crosswalks enhance comparison and harmonization of functional rhinoplasty outcomes.
AB - BACKGROUND: The Nasal Obstruction Symptom Evaluation (NOSE) and the Functional subscale of the Standardized Cosmesis and Health Nasal Outcomes Survey (SCHNOS-O) are widely used patient-reported outcome measures to measure functional outcomes of rhinoplasty. However, as different instruments produce scores on different metrics, results of these instruments cannot be linked directly, thus hindering comparison and aggregating of rhinoplasty outcome data from practices using either instrument. The aim of this study was to develop and validate crosswalks between the NOSE and the SCHNOS-O.METHODS:In a sample of 552 rhinoplasty patients who completed both instruments, the NOSE and SCHNOS-O scales were co-calibrated onto a common interval-scaled metric using Rasch analysis. Separate Rasch models were run per instrument, and the latent constructs were estimated using the calibrated item parameters. By anchoring original patient-reported outcome measure scores of both instruments to this Rasch computed measurement scale, the scores of both instruments were linked. A second independent sample was used to validate the created crosswalks. RESULTS: Total scores on the NOSE and SCHNOS-O were strongly correlated. The Rasch-based co-calibration of the NOSE and SCHNOS-O items resulted in a model that adequately fitted the data. Back-and-forth crosswalk tables were created from the NOSE to the SCHNOS-O. For patients with moderate nasal obstruction, predicted SCHNOS-O scores were slightly higher for a given level of the NOSE. Intraclass correlation coefficients between predicted and actual scores were 0.93 for both directions, indicating adequate agreement for group-level comparisons. CONCLUSIONS: This study developed and validated Rasch-based crosswalks from the NOSE to the SCHNOS-O and vice versa. The provided crosswalks enhance comparison and harmonization of functional rhinoplasty outcomes.
UR - http://www.scopus.com/inward/record.url?scp=85204786966&partnerID=8YFLogxK
U2 - 10.1097/PRS.0000000000011438
DO - 10.1097/PRS.0000000000011438
M3 - Article
C2 - 38551458
AN - SCOPUS:85204786966
SN - 0032-1052
VL - 154
SP - 955
EP - 963
JO - Plastic and Reconstructive Surgery
JF - Plastic and Reconstructive Surgery
IS - 5
ER -