Correlation between lumbar intervertebral disc height and lumbar spine sagittal alignment among asymptomatic Asian young adults

Table 5 Correlations (r) between IDH and PI for each group

Roussouly types	Level	r	p
Type I	L1–L2	0.4266	0.0133
	L2–L3	0.3992	0.0214
	L3–L4	0.5033	0.0028
	L4–L5	0.4008	0.0208
	L5–S1	0.4855	0.0042
Type II	L1–L2	0.4429	0.0016
	L2–L3	0.4907	0.0004
	L3–L4	0.5081	0.0002
	L4–L5	0.4960	0.0003
	L5–S1	0.4360	0.0020
Type III	L1–L2	0.4989	< 0.0001
	L2–L3	0.5396	< 0.0001
	L3–L4	0.4683	< 0.0001
	L4–L5	0.5928	< 0.0001
	L5–S1	0.5203	< 0.0001
Type IV	L1–L2	0.4220	0.0504*
	L2–L3	0.5656	0.0061
	L3–L4	0.7636	< 0.000
	L4–L5	0.7645	< 0.000
	L5–S1	0.6438	0.0012

ISSN: 1749-799X