From breast-Q © to Q-score ©: Using rasch measurement to better capture breast surgery outcomes Conference Paper

  


Authors: Cano, S. J.; Klassen, A. F.; Pusic, A. L.
Title: From breast-Q © to Q-score ©: Using rasch measurement to better capture breast surgery outcomes
Conference Title: 14th Joint International IMEKO TC1, TC7, TC13 Symposium on Intelligent Quality Measurements - Theory, Education and Training 2011
Abstract: The two aims of this study were: 1) to bring together Rasch measurement methods (RMMs) with substantive clinically-grounded hypotheses to develop measures of health-related quality of life and patient satisfaction for reconstructive and cosmetic breast surgery; and 2) develop an accessible scoring program to provide automated clinically interpretable scores, based on calibrated item locations. We constructed a new patient reported outcome (PRO) instrument (BREAST-Q ©) from patient interviews (n=48), focus groups (n=18), and expert opinion. It was then fieldtested in samples of breast surgery patients (n=1950 & n=817). Item generation led to three separate modules for different types of breast surgery, each with a pre- and postoperative version: 1) augmentation; 2) reconstruction; and 3) reduction. RMMs supported the summing of items to form a total score for all subscales, in each module. Based on these analyses the Q-Score © scoring algorithm program was developed, tested and finalised. The BREAST-Q © is an advance on the way PROs are currently measured and can provide essential information about the impact and effectiveness of breast surgery from the patients' perspective. The Q-Score © program enables the BREAST-Q © to be widely used and interpreted correctly, underpinned by an equivalent frame of reference across different clinical settings.
Keywords: construct theory; patient reported outcome instruments; rasch measurement
Journal Title Proceedings of the 14th Joint International IMEKO TC1 + TC7 + TC 13 Symposium
Conference Dates: 2011 Aug 31-Sep 2
Conference Location: Jena, Germany
ISBN: 978-1-61839-306-7
Publisher: Curran Associates, Inc.  
Date Published: 2011-01-01
Start Page: 82
End Page: 94
Language: English
PROVIDER: scopus
DOI/URL:

http://www.scopus.com/inward/record.url?eid=2-s2.0-84872561660&partnerID=40&md5=56fd26a0cb04b8790f043e9778fbe79e
Notes: --- - 14th Joint International IMEKO TC1, TC7, TC13 Symposium on Intelligent Quality Measurements - Theory, Education and Training 2011, Held in Conj. with the 56th IWK Ilmenau University of Technology - Jt. Int. IMEKO TC, TC, TC Symp. Intelligent Qual. Meas. - Theory, Educ. Train., Held Conjunction IWK Ilmenau Univ. Technol. - "Conference code: 94996" - "Export Date: 1 February 2013" - 31 August 2011 through 2 September 2011 - "Source: Scopus"