Table 2.

Classification of DSA (Maruo’s criteria) and details

	n	Intitial age at hemodialysis	Period of hemodialysis	C2/C7 angle	Existence of local kyphosis (%)
Stage 1	8	52.0 ± 9.0	11 ± 3.4	13.1 ± 2.3	0 (0)
Stage 2	39	51.4 ± 6.0	10 ± 2.9	14.2 ± 3.4	2 (5.1)
Stage 3 type A	5	49.0 ± 8.0	12 ± 7.8	10.2 ± 2.0	5 (100)*
Stage 3 type B	11	53.0 ± 7.2	15 ± 2.1	6.0 ± 1.5*	11 (100)*
Stage 3 type D	33	52.2 ± 8.0	13 ± 6.8	13.4 ± 2.4	5 (15.2)
Total	96	Average: 52.0 ± 13.0	Average: 12.9 ± 6.9

*P < 0.001