Computed tomography-derived assessment of respiratory impairment in thoracic scoliosis: Comparison between idiopathic and non-idiopathic etiologies

Table 3 Spearman’s rank correlations between spinal thoracic deformity parameters and computed tomography-derived respiratory function parameters in patients with non-idiopathic scoliosis

		Cobb angle		AVT		AVB-R		RAml		RAsag
		ρ	P value	ρ	P value	ρ	P value	ρ	P value	ρ	P value
TLC%		-0.52	0.004	-0.42	0.02	0.52	0.004	-0.50	0.005	-0.50	0.005
Lung volume	Total	-0.55	0.002	-0.43	0.02	0.50	0.005	-0.52	0.003	-0.48	0.008
	Right	-0.48	0.009	-0.37	0.04	0.48	0.008	-0.46	0.01	-0.45	0.01
	Right upper	-0.50	0.005	-0.35	0.06	0.53	0.003	-0.43	0.02	-0.44	0.01
	Right middle	-0.26	0.17	-0.30	0.11	0.40	0.03	-0.41	0.02	-0.45	0.01
	Right lower	-0.42	0.02	-0.30	0.11	0.39	0.03	-0.38	0.04	-0.36	0.06
	Left	-0.62	< 0.001	-0.45	0.01	0.48	0.008	-0.54	0.002	-0.48	0.009
	Left upper	-0.56	0.001	-0.48	0.009	0.50	0.006	-0.54	0.002	-0.47	0.01
	Left lower	-0.62	< 0.001	-0.44	0.01	0.38	0.04	-0.55	0.002	-0.50	0.006
Tracheal bifurcation	Min diameter	-0.41	0.02	-0.35	0.06	0.23	0.23	-0.27	0.16	-0.21	0.26
	Max diameter	-0.53	0.003	-0.36	0.05	0.38	0.04	-0.42	0.02	-0.30	0.11
	Area	-0.52	0.004	-0.38	0.04	0.31	0.09	-0.36	0.054	-0.25	0.19
The narrowest tracheal segment	Min diameter	-0.29	0.12	-0.40	0.03	0.32	0.09	-0.38	0.04	-0.30	0.11
	Max diameter	-0.32	0.09	-0.37	0.04	0.37	0.048	-0.36	0.06	-0.24	0.20
	Area	-0.33	0.08	-0.39	0.03	0.45	0.01	-0.41	0.02	-0.32	0.08
The narrowest left bronchus	Min diameter	-0.39	0.03	-0.40	0.03	0.24	0.21	-0.37	0.049	-0.33	0.07
	Max diameter	-0.36	0.054	-0.36	0.06	0.24	0.21	-0.31	0.10	-0.27	0.15
	Area	-0.37	0.050	-0.38	0.04	0.18	0.33	-0.35	0.06	-0.33	0.08
The narrowest right bronchus	Min diameter	-0.42	0.02	-0.38	0.04	0.078	0.69	-0.31	0.10	-0.28	0.13
	Max diameter	-0.41	0.02	-0.35	0.06	0.051	0.79	-0.31	0.10	-0.23	0.22
	Area	-0.42	0.02	-0.38	0.04	0.073	0.70	-0.32	0.09	-0.25	0.18
Right-to-left bronchial length ratio		0.27	0.15	0.26	0.17	-0.29	0.12	0.43	0.02	0.47	0.01

AVT: Apical vertebral translation; AVB-R: Apical vertebral body-rib ratio; RAml: Rotation relative to anterior midline; RAsag: Rotation relative to sagittal plane; TLC%: Predicted total lung capacity percentage.