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

Antonia F Chen; Wenzhu Bi; Dilrukshika Singhabahu; Joanne Londino; Justin Hohl; Maeve Ward; W Timothy Ward

doi:10.1016/j.jspd.2012.12.003

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

Spine Deform. 2013 Mar;1(2):108-114. doi: 10.1016/j.jspd.2012.12.003. Epub 2013 Mar 15.

Authors

Antonia F Chen¹, Wenzhu Bi², Dilrukshika Singhabahu², Joanne Londino¹, Justin Hohl¹, Maeve Ward¹, W Timothy Ward³

Affiliations

¹ Department of Orthopaedics, Children's Hospital of Pittsburgh of UPMC, University of Pittsburgh, Department of Orthopaedics, 4401 Penn Avenue, Fourth Floor, Pittsburgh, PA 15224, USA.
² Department of Biostatistics, A414 Crabtree Hall, 130 DeSoto Street, Pittsburgh, PA 15261, USA.
³ Department of Orthopaedics, Children's Hospital of Pittsburgh of UPMC, University of Pittsburgh, Department of Orthopaedics, 4401 Penn Avenue, Fourth Floor, Pittsburgh, PA 15224, USA. Electronic address: wardtw@upmc.edu.

PMID: 27927426
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.

Keywords: Adolescent idiopathic scoliosis; Converting equations; Medical/interventional; SRS-24; Scoliosis Research Society (SRS)-22r.