Converting Scoliosis Research Society-24 to Scoliosis Research Society-22r in a Surgical-Range, Medical/Interventional Adolescent Idiopathic Scoliosis Patient Cohort

• Published in: Spine deformity 2013-03, Vol.1 (2), p.108-114
• Main Authors: Chen, Antonia F., MD/MBA, Bi, Wenzhu, PhD, Singhabahu, Dilrukshika, BSc, Londino, Joanne, RN, BSN, Hohl, Justin, MD, Ward, Maeve, BA, Ward, W. Timothy, MD
• Format: Article
• Language: English
• Subjects: Adolescent idiopathic scoliosis; Converting equations; Medical/interventional; Medicine & Public Health; Orthopedics; Scoliosis Research Society (SRS)-22r; SRS-24
• ISSN: 2212-134X; 2212-1358
• DOI: 10.1016/j.jspd.2012.12.003

Abstract Study Design Prospective questionnaire administration study. Objectives To assess the ability to translate total and domain scores from Scoliosis Research Society (SRS)-24 to SRS-22r in a surgical-range, medical/interventional adolescent idiopathic scoliosis (AIS) patient population. Summary of Background Data Conversion of SRS-24 to SRS-22r is demonstrated in an operative cohort of patients with AIS, but not in a medical/interventional patient population. Methods We simultaneously administered SRS-24 and SRS-22r questionnaires to 75 surgical-range, medical/interventional AIS patients and compared them. We performed analysis by regression modeling to produce conversion equations from SRS-24 to SRS-22r. Results The total SRS-24 score for these medical/interventional AIS patients was 92.5 ± 9.45 (mean, 3.9 ± 0.39), and the total SRS-22r score was 93.5 ± 9.63 (mean, 4.3 ± 0.44). The correlation between these 2 groups was fair (R2 = 0.77) and improved to good when mental health or recall questions were removed. The correlation was also fair for total pain domains (R2 = 0.73). However, there was poor correlation for general self-image (R2 = 0.6) and unacceptable for post-treatment self-image (R2 = 0.01), general function (R2 = 0.52), activity function (R2 = 0.56), and satisfaction (R2 = 0.53). Compared with a published population of operative AIS patients, R2 values for total SRS-24 scores, pain, general self-image, activity function, and satisfaction were similar (p > .05). The R2 values for general function and combined general and activity function were significantly different between the operative and medical/interventional cohorts. Conclusions Scoliosis Research Society-24 can be converted to SRS-22r scores with fair accuracy in the surgical-range, medical/interventional AIS patient population for total score, and total pain domains. The SRS-24 translates unacceptably to the SRS-22r in self-image, function, and satisfaction domains. The SRS-24 to SRS-22r conversion equations are similar to operative AIS patients, except for the function domain. Caution should be used when interpreting results based on translation of SRS-24 to SRS-22r values.