Comprehensive analysis of global spinopelvic alignment based on traditional and new parameters in normal Indian population

Abstract

Study Design: A retrospective cross-sectional study.

Purpose

To analyze the global sagittal spinopelvic alignment in the asymptomatic Indian population through the conventional and new global-regional parameters.

Methods

We included asymptomatic adults between 18 and 50 years old without a history of spinal surgery or significant musculoskeletal disorders. The sagittal profile was classified according to the theoretical Roussouly classification. The conventional and new spinopelvic parameters were measured using Surgimap. Correlation analysis was performed using Pearson’s correlation coefficient.

Results

104 participants (62 females and 42 males) were recruited. The type 3AP was the most common theoretical Roussouly classification at 28.8 %. Analyzing the new spinopelvic parameters, the mean values are Pelvic Incidence (PI): 45.433° ± 9.72°, L1 Pelvic Angle (PA): 5.240°± 6.7°, T1 Slope: 26.260°± 8.24°, C7 Slope: 23.073°± 8.35°, C2 Slope: 2.308°± 11.42°, T4 − L1 Pelvic Angle (PA): 2.10° ± 3.797°, Global Tilt (GT): 15.029° ± 10.80. PI correlated with the new parameters such as T4 Pelvic Angle (PA) and L1 PA. Furthermore, PT had a good correlation with GT, Spino Pelvic Angle (SPA), Spino Sacral Angle (SSA), and T1 − L1 Pelvic Angle (PA). Finally, the SVA C7 − S1 strongly correlates with the Odontoids – Hip Axis (ODHA).

Conclusion.

This study comprehensively analyzes the correlations between conventional and new regional and global sagittal spinal parameters in the asymptomatic Indian population. The normative data for the sagittal profile in Indian volunteers enunciated in this study can be used to guide surgical decisions.