Normative spino-pelvic parameters in patients with the lumbarization of S1 compared to a normal asymptomatic population

Introduction Normal spino-pelvic values for patients with lumbarization of S1 have not been described in the literature. Presented are the normal values for this population group, the prevalence of S1 lumbarization, and the correlation between pelvic incidence (PI) and lumbar lordosis (LL) in this group.