Reliability and Validity of the Swiss Spinal Stenosis Questionnaire for Iranian Patients with Lumbar Spinal Stenosis

Document Type : RESEARCH PAPER

Authors

1 Bahonar Hospital, School of Medicine, Kerman University of Medical Science, Kerman, Iran

2 School of Medicine, Kerman University of Medical Science, Kerman, Iran

Abstract

Background: The purpose of this study was validation of the Persian translation of the Swiss Spinal Stenosis
Questionnaire in order to be used by Iranian researchers.
Methods: A total of 104 patients with spinal stenosis diagnosis, who were candidates for operative treatment were
entered into the study. The patients completed the translated questionnaire in the 1st and the 7th days of admission
and 6 months after surgery. Visual analogue scale was used to determine the severity of the pain in the1st day and
the 6th month. Discriminant validity, convergent validity, test-retest reliability, internal consistency, ability to detect
changes and sensitivity to clinical changes were assessed for the statistical purposes.
Results: Cronbach’s α was more than 0.9 for all the items. ICC was about 0.9 for all the items. For symptoms, physical and
total items, Cronbach’s α was 0.942, 0.957, 0.926 and Intraclass correlation were 0.891, 0.918, 0.862, respectively. Paired
t-test was significantly different between the 1st day and the 6th month questionnaire. There was a positive correlation either
between the first VAS and the 1st day questionnaire (1st day Q) (r=0.892, P=0.000) or between the 6th month VAS and 6th
month Q (r=0.940, P=0.000). The Pearson’s correlation between the difference of the total scores of the 1st day and the
6th month and satisfaction score after surgery showed negative correlation (r= -0.746, P=0.000). The effect size was 2.55.
Conclusion: The Iranian version of the Swiss Spinal Stenosis has excellent internal consistency, excellent reliability,
good ability to alter with changes, especially parallel with clinical improvement, excellent ability to detect changes, and
well either convergent or discriminant validity.

Keywords

Main Subjects

References

1. Gardocki RJ, Park AL. Degenerative disorders of the
thoracic and lumbar spine. Campbell’s operative
orthopaedics. 13th ed. Philadelphia, PA: Elsevier;
2017. P. 1695-707.
2. Backstrom KM, Whitman JM, Flynn TW. Lumbar
spinal stenosis-diagnosis and management of the
aging spine. Man Ther. 2011; 16(4):308-17.
3. Garfin SR, Herkowitz HN, Mirkovic S. Instructional
course lectures, the American academy of orthopaedic
surgeons-spinal stenosis. JBJS. 1999; 81(4):572-86.
4. Stucki G, Daltroy L, Liang MH, Lipson SJ, Fossel AH, Katz
JN. Measurement properties of a self‐administered
outcome measure in lumbar spinal stenosis. Spine.
1996; 21(7):796-803.
5. Comer CM, Conaghan PG, Tennant A. Internal
construct validity of the swiss spinal stenosis
questionnaire: rasch analysis of a disease-specific
outcome measure for lumbar spinal stenosis. Spine.
2011; 36(23):1969-76.
6. Pratt RK, Fairbank JC, Virr A. The reliability of
the shuttle walking test, the swiss spinal stenosis
questionnaire, the Oxford spinal stenosis score, and
the oswestry disability index in the assessment of
patients with lumbar spinal stenosis. Spine. 2002;
27(1):84-91.
7. Komagamine Y, Kanazawa M, Kaiba Y, Sato Y, Minakuchi
S. Reliability and validity of a questionnaire for selfassessment
of complete dentures. BMC Oral Health.
2014; 14(1):45.
8. Yakut E, Düger T, Ö􀇆 ksüz Ç, Yörükan S, Ü􀇆 reten K,
Turan D, et al. Validation of the Turkish version of the
Oswestry Disability Index for patients with low back
pain. Spine. 2004; 29(5):581-5.
9. Allen PF, McMillan AS, Locker D. An assessment of
sensitivity to change of the oral health impact profile
in a clinical trial. Community Dent Oral Epidemiol.
2001; 29(3):175-82.
10. Cohen J. A power primer. Psychol Bull. 1992;
112(1):155.
11. Ahmadzadeh-Heshmati A, Ilka S, Saied AR. Evaluation
of biomechanical alteration of the spinal intervertebral
discs due to the degenerative process. Feyz J Kashan
Univ Med Sci. 2017; 21(3):286-91.
12. Truumees E. Spinal stenosis: pathophysiology, clinical
and radiologic classification. Instr Course Lect. 2005;
54(1):287-302.
13. Lurie JD, Tosteson TD, Tosteson A, Abdu WA, Zhao
W, Morgan TS, et al. Long-term outcomes of lumbar 
spinal stenosis: eight-year results of the Spine Patient
Outcomes Research Trial (SPORT). Spine (Phila Pa
1976). 2015; 40(2):63-76.
14. Zinbarg RE, Revelle W, Yovel I, Li W. Cronbach’s α,
Revelle’s β, and Mcdonald’s ω H: their relations with
each other and two alternative conceptualizations of
reliability. Psychometrika. 2005; 70(1):123-33.
15. Bland JM, Altman DG. Cronbach’s alpha. BMJ. 1997;
314(7080):572.
16. Shrout PE, Fleiss JL. Intraclass correlations: uses
in assessing rater reliability. Psychol Bull. 1979;
86(2):420-8.
17. Portney LG, Watkins MP. Foundations of clinical
research: applications to practice. New Jersey:
Prentice Hall; 2015.
The Archives of Bone and Joint Surgery
Volume 6, Issue 2
March 2018
Pages 119-123

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History

  • Receive Date: 12 May 2017
  • Revise Date: 17 November 2017
  • Accept Date: 05 December 2017

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