Increasing pelvic incidence is associated with more global sagittal imbalance in ankylosing spondylitis with thoracolumbar kyphosis: an observational retrospective study of 94 cases

Table 3 Linear regression model for PI with TPA and SPA in AS patients

	Unstandardized coefficients	Standardized coefficients	R² of model	P
TPA	0.323	0.533	0.284	< 0.001*
SPA	−0.251	−0.504	0.254	< 0.001*

AS ankylosing spondylitis; PI Pelvic incidence; SPA spinopelvic angle; TPA the first thoracic vertebra pelvic angle
*Statistically significant (P < 0.05)

ISSN: 1471-2474