Table 3.

Population Correlation Coefficients between Baseline Radiographic Parameters and Radiographic Modifier Groups and Baseline PROs

		SRS Pain	SRS Function	SRS Mental Health	SRS Self- Image	SRS Subscore	ODI	SF-12 MCS	SF-12 PCS
Continuous Radiographic Variable Correlations (Pearson)
Lumbar Cobb (LC- degrees) N= 286	r	.137	.128	.084	−.070	.094	−.112	.099	.117
Coronal Vertical Axis (CVA-cm) N=286	r	−.048	−.066	−.036	−.178	−.106	.109	−.061	−.081
Pelvic Tilt (PT-degrees) N=269	r	−.017	−.148	.042	−.099	−.069	.105	.093	−.162
PI-LL Mismatch (degrees) N=277	r	−.012	−.141	.040	−.144	−.080	.151	.068	−.169
Sagittal Vertical Axis (SVA-cm) N=285	r	−.052	−.206	−.009	−.191	−.146	.236	−.054	−.176
T12 – Sacrum (LL- degrees) N=286	r	−.089	−.192	−.023	−.165	−.151	.190	−.016	−.197
Pelvic Incidence (PI – degrees) N=277	r	.098	.077	.089	.026	.097	−.056	.107	.050
Sacral Slope (SS - degrees) N=286	r	.125	.208	.035	.111	.155	−.167	.033	.198
Radiographic Modifier Group Correlations (Spearman)
Lumbar Cobb Group N=286	r	.121	.148	.078	−.024	.091	−0.130	.105	.101
CVA Modifier Group N=285	r	.012	−.048	−.012	−.144	−.057	0.081	−.062	−.025
PI-LL Mismatch Modifier Group N=277	r	−.016	−.151	.060	−.088	−.067	.137	.083	−.174
PT Modifier Group N=269	r	−.068	−0.163	−.027	−.061	−.101	0.142	.046	−.193
SVA Modifier Group N=285	r	−.069	−.204	−.049	−.166	−.155	.230	−.103	−.165

Greater sagittal imbalance was weakly correlated with higher (more pathology) ODI scores (r=.236) and lower (more pathology) SRS Function scores (−.206). This was also true for the SVA Modifier group as well. Greater sacral slope was weakly correlated with higher (less pathology) SRS Function domain scores.