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

Table 2 Spearman’s rank correlations between spinal thoracic deformity parameters and computed tomography-derived respiratory function parameters in patients with 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%		0.069	0.74	-0.28	0.16	0.24	0.24	-0.37	0.06	-0.32	0.11
Lung volume	Total	0.12	0.54	-0.21	0.30	0.22	0.28	-0.42	0.03	-0.40	0.04
	Right	0.11	0.60	-0.30	0.13	0.34	0.09	-0.53	0.005	-0.57	0.002
	Right upper	0.21	0.30	-0.18	0.38	0.18	0.38	-0.39	0.04	-0.48	0.01
	Right middle	0.006	0.97	-0.25	0.21	0.35	0.07	-0.35	0.07	-0.28	0.16
	Right lower	0.12	0.56	-0.30	0.13	0.35	0.08	-0.54	0.004	-0.59	0.001
	Left	0.10	0.61	-0.08	0.69	0.053	0.80	-0.28	0.17	-0.20	0.31
	Left upper	0.24	0.22	-0.12	0.55	0.11	0.59	-0.30	0.14	-0.33	0.09
	Left lower	-0.088	0.67	-0.15	0.46	0.16	0.42	-0.31	0.13	-0.16	0.42
Tracheal bifurcation	Min diameter	0.29	0.15	-0.23	0.91	0.19	0.34	-0.22	0.28	-0.29	0.15
	Max diameter	-0.15	0.46	-0.25	0.22	0.24	0.23	-0.23	0.26	-0.15	0.45
	Area	0.042	0.84	-0.15	0.47	0.31	0.12	-0.31	0.12	-0.26	0.20
Narrowest tracheal segment	Min diameter	-0.21	0.30	-0.42	0.03	0.56	0.003	-0.56	0.003	-0.45	0.02
	Max diameter	0.063	0.76	-0.13	0.52	0.35	0.08	-0.37	0.06	-0.36	0.07
	Area	-0.11	0.57	-0.28	0.17	0.47	0.01	-0.51	0.008	-0.43	0.03
Narrowest left bronchus	Min diameter	-0.065	0.75	-0.13	0.53	0.22	0.27	-0.24	0.24	-0.15	0.47
	Max diameter	-0.15	0.44	-0.23	0.25	0.31	0.12	-0.36	0.07	-0.22	0.27
	Area	-0.091	0.66	-0.18	0.37	0.27	0.18	-0.30	0.13	-0.19	0.34
Narrowest right bronchus	Min diameter	0.053	0.77	-0.097	0.64	0.14	0.49	-0.10	0.62	0.008	0.96
	Max diameter	0.066	0.75	-0.11	0.57	0.24	0.23	-0.21	0.31	-0.13	0.50
	Area	0.011	0.95	-0.22	0.28	0.30	0.13	-0.28	0.16	-0.17	0.39
Right-to-left bronchial length ratio		0.40	0.043	0.42	0.03	-0.40	0.04	0.28	0.16	0.11	0.59

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.