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Table 1 Correlation analysis between change in thoracic kyphosis and variables

From: Influence of screw density on thoracic kyphosis restoration in hypokyphotic adolescent idiopathic scoliosis

Variable Pearson correlation coefficients Spearman correlation coefficients
Correlation coefficient 95% CI Statistical significance Correlation coefficient 95% CI Statistical significance
Age −0.025 (−0.217, 0.178) 0.853 0.017 (−0.220, 0.269) 0.899
Flexibility (%) 0.357 (0.171, 0.534) 0.006 0.384 (0.136, 0.578) 0.003
Preoperative MT Cobb angle (°) −0.138 (−0.390, 0.136) 0.304 −0.097 (−0.369, 0.180) 0.475
Preoperative TK (T5–T12; °) −0.408 (−0.609, −0.186) 0.002 −0.445 (−0.626, −0.214) 0.001
Preoperative LL (L1–S1; °) 0.148 (−0.152, 0.459) 0.272 0.237 (−0.022, 0.476) 0.076
Fused levels 0.010 (−0.207, 0.220) 0.941 0.002 (−0.254, 0.267) 0.987
Screw density of concave side 0.306 (0.052, 0.502) 0.021 0.290 (0.016, 0.513) 0.029
Screw density of convex side 0.061 (−0.222, 0.329) 0.655 0.063 (−0.205, 0.318) 0.643
Total screw density 0.206 (−0.069, 0.427) 0.123 0.213 (−0.054, 0.441) 0.112
  1. MT indicates main thoracic; TK thoracic kyphosis, LL lumbar lordosis