Modular radiographic classification system may be reliable for adult idiopathic scoliosis
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A new modular, radiographic classification system may reliably categorize the radiographic features of patients with adult idiopathic scoliosis to facilitate clinical treatment and research, according to published results.
The system, which was developed by researchers at Mount Sinai Health System, consists of curve type, a lumbosacral modifier and a global alignment modifier. This new classification technique is intended for adult idiopathic scoliosis and serves as an extension of the Lenke classification – a system designed strictly for adolescent idiopathic scoliosis.
According to the study, 12 spine surgeons assessed 30 operative cases of adult idiopathic scoliosis twice. The cases were presented approximately 1-week apart, and case order was randomized between sessions. The surgeons calculated interrater and intrarater reliability using Fleiss’s kappa coefficient.
“The interrater reliability for curve type was 0.660 and 0.798, for the lumbosacral modifier 0.944 and 0.965 and for the global alignment modifier 0.922 and 0.916, for round 1 and 2 respectively,” the researchers wrote in the study. “Mean intrarater reliability was 0.807,” they added.
The researchers deemed the classification system reliable.
“This new radiographic classification of adult idiopathic scoliosis maintains the curve types from the Lenke classification and introduces the lumbosacral and global alignment modifiers,” they wrote. “The reliability of the lumbosacral modifier and global alignment modifier shows near perfect agreement and sets the foundation for further studies to validate the reliability, utility and applicability of this classification system,” the researchers concluded.
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