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DISCRIMINATION VALIDITY OF THE SCOLIOSIS RESEARCH SOCIETY – 22 PATIENT QUESTIONNAIRE: RELATIONSHIP TO IDIOPATHIC SCOLIOSIS CURVE PATTERN AND CURVE SIZE

Kansas University Medical Center, Kansas City, Kansas, USA

Introduction: It is now well recognised that the patient’s perception of the medical problem and the treatment for the medical problem are not always the same as the facts of the diagnosis and treatment process. The study being reported was conducted to determine the validity of the SRS-22 patient questionnaire for the discrimination of scoliosis patients based on curve pattern and curve size.

Materials: Three study groups were developed. The first or control group consisted of patients who had been referred for evaluation of suspected scoliosis but documented by X-ray not to have structural scoliosis of 10° or more. The second group, a non surgical group (NS) consisted of patients with documented idiopathic scoliosis who were either being evaluated and discharged, observed either short or long term, or who had been or would be braced. The third or surgical group (S) were being seen prior to primary idiopathic scoliosis surgery. Patients with comorbidities were excluded.

Methods: Deformity pattern and Cobb measurement were determined from standing frontal and sagittal plane radiographs. Each patient completed a SRS-22 outcomes questionnaire leaving off the satisfaction with management domain. Thus there were four domains: pain; self image; function; and mental health, five questions per domain. Scoring is 5 best and 1 lowest. Case series: Patients were gathered between October 1999 and September 2000. The control group consisted of 17 patients average age 13 years. Non surgical group included 72 patients of average age 16 years and average scoliosis of 33°. The surgical group consisted of 33 patients of average age 16 years with an average curve size of 64°.

Statistical analysis: The effect of curve pattern was studied with ANOVA and the effect of curve size by the Pearson correlation coefficient.

Results: There were 69 patients with single, 33 with double and three with triple curves. There was no difference in SRS domain or total scores based on curve pattern. There was a very significant correlation between curve size and SRS-22 score, p>0.001 for pain; self image, function; and a total of these domains. For mental health there was also a significant relationship at p=0.0124.

Conclusion: The SRS-22 questionnaire successfully discriminates among persons with no scoliosis, moderate scoliosis, and large scoliosis by curve size. It does not discriminate among patients with single, double or triple curves.

Abstracts prepared by Mr J. Dorgan. Correspondence should be addressed to him at the Royal Liverpool Children’s Hospital, Alder Hey, Eaton Road, Liverpool L12 2AP, UK

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