SciELO - Scientific Electronic Library Online

vol.73Audiometric evaluation in individuals with mucopolysaccharidosisRelationships of interleukin-10 with the regulatory T cell ratio and prognosis of cervical cancer patients author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links



Print version ISSN 1807-5932On-line version ISSN 1980-5322


PRATALI, Raphael R. et al. Normal values for sagittal spinal alignment: a study of Brazilian subjects. Clinics [online]. 2018, vol.73, e647.  Epub Dec 03, 2018. ISSN 1980-5322.


The purpose of this study is to investigate the normal values of and chain of correlations between spinopelvic parameters in a Brazilian population.


This is a prospective observational study including asymptomatic adult subjects who had full spinal radiographs performed. The subjects were stratified by age into 3 groups (18-39 years old, 40-59 years old, and >60 years old), and radiographic parameters were compared across age groups and gender using ANOVA and Student’s t-test, respectively. The relationships between various radiographic parameters were evaluated with Pearson correlation coefficients.


One hundred and thirty asymptomatic volunteers (mean age, 48 years) met the inclusion criteria. The mean sagittal parameters in a normal Brazilian population were as follows: lumbar lordosis (LL) of 56.8°, pelvic tilt (PT) of 12.4°, pelvic incidence (PI) of 49.4°, PI-LL of -7.4°, T1 pelvic angle (TPA) of 8°, sagittal vertical axis (SVA) of -0.54 cm and T1 slope of 25.2°. Subjects ≥60 years old had significantly higher values of SVA (p=0.024) and TPA (p=0.009) than the two younger age groups. The TPA was significantly correlated with the following spinopelvic parameters: LL (r=-0.172, p=0.005), PT (r=0.776, p<0.001), PI (r=0.508, p<0.001), PI-LL (r=0.717, p<0.001), SVA (r=0.409, p<0.001) and T1 slope (r=0.172, p=0.050).


This study demonstrated significant physiologic trunk inclination with increasing age. The TPA, an angular parameter of global spinal alignment, presented a chain of correlations with different spinal segments.

Keywords : Spinal Curvature; Bone Alignment; X-rays; Epidemiologic Measurements; Reference Values.

        · text in English     · English ( pdf )