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Table 2 Results of Pearson or Spearman correlation analyses for hidden blood loss

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 Sig (2-tailed) P
Age 0.102 0.058
Gender 0.137 0.000
BMI -0.006 0.873
ASA 0.021 0.567
Preoperative Cobb angle 0.082 0.024
Preoperative Hct 0.145 0.000
Preoperative APTT 0.049 0.176
Preoperative PT -0.005 0.901
Operation time 0.112 0.002
Bone mineral density -0.066 0.068
Segment number 0.074 0.040
Pedicle screw number 0.053 0.146
Osteotomy 0.027 0.449
Autologous blood transfusion 0.009 0.803
Allogeneic blood transfusion 0.194 0.000
Postoperative drainage -0.017 0.631
Tranexamic acid -0.159 0.000