The researchers obtained anteroposterior and lateral
X-rays of the whole spine for all patients. Those that were
not digital were scanned and all were entered into X-ray
analysis software (SurgimapSpine, Nemaris Inc., http://
www.surgimap.com) for processing. Patients were classified
according to the revised SRSeSchwab ASD (SRS-S)
classification based on these X-rays