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Table 4 Univariate analysis between the postoperative transfusion group and the nontransfusion group of scoliosis corrective surgery patients

From: Hidden blood loss in adolescent idiopathic scoliosis patients undergoing posterior spinal fusion surgery: a retrospective study of 765 cases at a single centre

Parameters

Transfusion group

Non-Transfusion group

P

Age

14.3 ± 1.8

14.5 ± 1.7

0.504

Gender,male/total(%)

17/205(8.3 %)

111/560(19.8 %)

0.000

BMI, kg/m2

18.0 ± 3.3

18.6 ± 3.0

0.018

Preoperative Hb, g/L

130.3 ± 11.5

136.8 ± 11.2

0.000

Preoperative Cobb angle, degree

48.9 ± 12.6

47.2 ± 10.6

0.055

Preoperative Hct(%)

38.7 ± 3.0

40.3 ± 2.9

0.949

Preoperative PLT,109/l

228.7 ± 52.7

232.4 ± 48.1

0.364

Preoperative INR

1.06 ± 0.07

1.05 ± 0.08

0.151

Preoperative PT, s

12.1 ± 0.9

12.0 ± 0.9

0.061

Preoperative APTT, s

32.4 ± 4.0

30.9 ± 4.0

0.983

Preoperative BUN, mmol/L

4.4 ± 1.1

4.4 ± 1.1

0.593

Preoperative SCR, µmol/L

47.2 ± 9.5

49.5 ± 10.0

0.536

ASA (I/II)

94/111

296/264

0.087

Segment number, n

10.7 ± 2.3

9.9 ± 2.5

0.028

Operation time, min

256.0 ± 63.3

247.9 ± 59.3

0.101

Pedicle screw number, n

15.6 ± 2.3

15.0 ± 2.7

0.010

Osteotomy, n(%)

30(14.6 %)

72(12.9 %)

0.549

Postoperative drainage, ml

545.3 ± 225.1

434.5 ± 181.6

0.009

Tranexamic acid, n(%)

22(10.7 %)

80(14.3 %)

0.230

Intraoperative blood loss, ml

997.6 ± 641.1

900.9 ± 555.9

0.057

HBL, ml

1005.9 ± 594.1

579.2 ± 358.7

0.000