Measurement Properties of the Scoliosis Research Society Outcomes Questionnaire in Adolescent Patients With Spondylolisthesis.
METHODS
Prospective validation of the Scoliosis Research Society Outcomes Questionnaire French-Canadian version (SRS-22fv) in adolescent patients with spondylolisthesis.


OBJECTIVE
To determine the measurement properties of the SRS-22fv.


BACKGROUND
The SRS-22 is widely used for the assessment of health-related quality of life in adolescent idiopathic scoliosis (AIS) and other spinal deformities. Spondylolisthesis has an important effect on quality of life. The instrument was previously used in this population, although its measurement properties remained unknown. We aim to determine its reliability, factorial, concurrent validity, and its discriminant capacity in an adolescent spondylolisthesis population.


METHODS
The SRS-22fv was tested in 479 subjects (272 patients with spondylolisthesis, 143 with AIS, and 64 controls) at a single institution. Its reliability was measured using the coefficient of internal consistency, concurrent validity by the short form-12 (SF-12v2 French version) and discriminant validity using multivariate analysis of variance, analysis of covariance, and multivariate linear regression.


RESULTS
The SRS-22fv showed a good global internal consistency (spondylolisthesis: Cronbach α = 0.91, AIS: 0.86, and controls: 0.78) in all its domains for spondylolisthesis patients. It showed a factorial structure consistent with the original questionnaire, with 60% of explained variance under four factors. Moderate to high correlation coefficients were found for specifically corresponding domains between SRS-22fv and SF-12v2. Boys had higher scores than do girls, scores worsened with increasing age and body mass index. Analysis of covariance showed statistically significant differences between patients with spondylolisthesis, patients with AIS, and controls when controlling for age, sex, body mass index, pain, function, and self-image scores. In the spondylolisthesis group, scores on all domains and mean total scores were significantly lower in surgical candidates and in patients with high-grade spondylolisthesis. Low to moderate ceiling effects were shown in function (1.1%), self-image (10.7%), and pain (13.6%).


CONCLUSIONS
The SRS-22fv can discriminate between healthy and spondylolisthesis subjects. It can be used in spondylolisthesis patients to assess health-related quality of life.


METHODS
4.
University of Montreal, Faculty of Medicine, departement of surgery, Montréal, Québec, Canada.|CHU Sainte-Justine, Department of Surgery, Pediatric Orthopaedics, Montreal, Québec, Canada.
Gabriel
G
Gutman
CHU Sainte-Justine, Department of Surgery, Pediatric Orthopaedics, Montreal, Québec, Canada.
Julie
J
Joncas
University of Montreal, Faculty of Medicine, departement of surgery, Montréal, Québec, Canada.|CHU Sainte-Justine, Department of Surgery, Pediatric Orthopaedics, Montreal, Québec, Canada.|Hôpital du Sacré-Cœur de Montréal, department of surgery, Orthopaedics, Montréal, Québec, Canada.
Jean-Marc
JM
Mac-Thiong
CHU Sainte-Justine, Department of Surgery, Pediatric Orthopaedics, Montreal, Québec, Canada.
Marie
M
Beauséjour
CHU Sainte-Justine, Department of Surgery, Pediatric Orthopaedics, Montreal, Québec, Canada.
Marjolaine
M
Roy-Beaudry
University of Montreal, Faculty of Medicine, departement of surgery, Montréal, Québec, Canada.|CHU Sainte-Justine, Department of Surgery, Pediatric Orthopaedics, Montreal, Québec, Canada.
Hubert
H
Labelle
University of Montreal, Faculty of Medicine, departement of surgery, Montréal, Québec, Canada.|CHU Sainte-Justine, Department of Surgery, Pediatric Orthopaedics, Montreal, Québec, Canada.
Stefan
S
Parent
D000293:Adolescent; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D011788:Quality of Life; D015203:Reproducibility of Results; D013168:Spondylolisthesis / Q000453:epidemiology / Q000523:psychology; D011795:Surveys and Questionnaires / Q000592:standards*