Table 3.

Correlation between the correction losses and chronological age at surgery, screw types, screw lengths, preoperative and postoperative value, and amount of correction obtained by surgery

	Correction loss of rAVR	Correction loss of Cobb angle	Correction loss of AVT	Correction loss of Kyphosis	Correction loss of ATR
Chronological age at surgery
p	0.5148	0.4355	0.4508	0.9913	0.1817
R	−0.128	−0.153	−0.148	−0.002	−0.262
Number of fused vertebrae
p	0.6903	0.3464	0.6461	0.6512	0.3838
R	0.078	0.185	0.09	0.089	0.171
Proportion of multi-axial screw (%)
p	0.0341*	0.0666	0.4592	0.5806	0.0041*
R	0.415	−0.36	0.145	−0.108	0.563
Proportion of screw length of 30 mm or shorter
p	0.7823	0.2742	0.5532	0.896	0.0776
R	0.054	0.214	0.116	−0.026	0.346
Preoperative valuea
p	0.0023*	0.0069*	0.244	0.0083*	0.0075*
R	0.597	0.530	−0.228	0.518	0.525
Postoperative valueb
p	0.0085*	0.2074	0.3365	0.1189	0.0297*
R	0.516	0.247	−0.188	−0.306	0.426
Amount of correction obtained by surgeryc
p	0.2992	0.056	0.5568	0.0055*	0.0555
R	0.204	0.375	−0.115	0.545	0.376

R Spearman’s rank correlation coefficient, p p value

* Significant correlation by Spearman’s rank correlation

^aPreoperative value of each parameter in the row

^bPostoperative value of each parameter in the row

^cAmount of correction obtained by surgery of each parameter in the row