Table 1 Demographic data between group MSS and group AIS (x ± SD)

Age (year)

15.2 (10~20)

14.5 (10~20)

Gender ratio (M:F)

11:31

34:134

Fusion level (vertebra)

11.5 ± 2.8 (5~15)

11.0 ± 2.7 (5~16)

Operation duration (hour)

4.6 ± 1.5 (2.2~9)

4.0 ± 1.1 (2.2~8)*

Total EBL (ml)

845 ± 441 (300~2500)

698 ± 458 (200~5000)*

EBL per vertebra fused (ml)

74.6 ± 37.2 (29~208)

63.1 ± 31.7 (20~313)*

Auto-transfusion (ml)

487 ± 318 (33 cases) (100~1300)

367 ± 233 (136 cases) (100~1900)*

RBC transfusion (U)

3.5 ± 2.1 (13 cases) (2~9)

2.8 ± 1.2 (63 cases) (2~8)

Whole blood transfusion (ml)

700 ± 316 (10 cases) (400~1200)

511 ± 219 (18 cases) (200~1000)

Plasma transfusion (ml)

475 ± 237 (8 cases) (200~800)

385 ± 112 (26 cases) (200~800)

Total transfusion (ml)

1151 ± 1018 (39 cases) (100~4640)

894 ± 790 (156 cases) (100~4847)

Body height change (cm)

4.5 ± 2.4 (1~12)

4.1 ± 1.6 (1~10)