The validity of the SRS-22 instrument in an adult spinal deformity population compared with the Oswestry and SF-12: A study of response distribution, concurrent validity, internal consistency, and reliability

• Published in: Spine (Philadelphia, Pa. 1976) Pa. 1976), 2005-02, Vol.30 (4), p.455-461
• Main Authors: BRIDWELL, Keith H, CATS-BARIL, William, HARRAST, John, BERVEN, Sigurd, GLASSMAN, Steven, FARCY, Jean-Pierre, HORTON, William C, LENKE, Lawrence G, BALDUS, Christine, RADAKE, Terri
• Format: Article
• Language: English
• Subjects: Adolescent; Adult; Aged; Biological and medical sciences; Cerebrospinal fluid. Meninges. Spinal cord; Cerebrospinal fluid. Spinal cord. Spinal roots. Spinal nerves; Congenital Abnormalities; Female; Follow-Up Studies; Humans; Injuries of the nervous system and the skull. Diseases due to physical agents; Male; Medical sciences; Middle Aged; Nervous system (semeiology, syndromes); Neurology; Neurosurgery; Pain Measurement - methods; Pain Measurement - standards; Prospective Studies; Reproducibility of Results; Spinal Cord - abnormalities; Spinal Cord - pathology; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases; Traumas. Diseases due to physical agents
• ISSN: 0362-2436; 1528-1159
• DOI: 10.1097/01.brs.0000153393.82368.6b

Prospective analysis of a consecutive cohort of adult spinal deformity patients queried over a 12-month period. To assess the SRS-22 instrument compared with the SF-12 and Oswestry. Very few reports in the literature have applied the SRS-22 to adult spinal deformity patients. Consecutive adult spinal deformity patients were applied the SRS-22, SF-12, and Oswestry. Four analyses were done: 1) floor/ceiling effect; 2) Pearson's correlation coefficients between the SRS-22, SF-12, and Oswestry; 3) Cronbach's alpha analysis for internal consistency within the SRS-22; and 4) test/retest. Floor/ceiling range for the SRS-22 compared favorably with the SF-12 and Oswestry. The Pearson's coefficients correlating the two questionnaires relative to the SRS-22 were > 0.7. The Cronbach's alpha within each domain for the SRS-22 were > 0.7, except for pain (0.67). Test/retest correlation coefficients ranged from 0.84 to 0.95 for the subscales. The SRS-22 is a disease-specific instrument with the capacity to demonstrate change in health status more effectively than the SF-12 and in more domains than the Oswestry. The SRS-22 showed high criterion validity with the SF-12 and Oswestry based on Pearson's coefficients. High Cronbach's alpha scores suggested a high internal consistency within each domain of the SRS-22, except for pain (0.67). Test/retest reliability was excellent.