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Table 3 Results of the Pearson or Spearman correlation analysis

From: Analysis of risk factors for perioperative hidden blood loss in unilateral biportal endoscopic spine surgery: a retrospective multicenter study

Parameters

Sig (two-tailed)

P

Sex

0.065

0.489

Age

0.089

0.035*

BMI

−0.054

0.321

Hypertension

0.651

0.684

Diabetes mellitus

0.183

0.495

Smoking

0.845

0.267

Drinking

0.254

0.516

Length of stay

−0.087

0.154

Disease groups

 Lumbar disc herniation

0.065

0.125

 Lumbar stenosis

0.057

0.654

 Lumbar spondylolisthesis

0.054

0.054

Number of fusion levels

0.987

0.000**

Fusion level

 L3-L4

0.058

0.298

 L4-L5

0.168

0.698

 L5-S1

0.751

0.541

ASA classification

0.598

0.000**

Surgery time

0.824

0.039**

PBV

0.542

0.014*

TBL

0.982

0.002**

VBL

0.215

0.098

Preoperative Hb

−0.069

0.058

Preoperative Hct

−0.058

0.692

Postoperative Hb

−0.534

0.000*

Postoperative Hct

−0.845

0.000*

Hb loss

0.265

0.018*

Hct loss

0.726

0.038*

Preoperative ALB

0.315

0.641

PT

−0.264

0.215

APTT

−0.298

0.024*

Platelet

0.098

0.569

Fibrinogen

−0.949

0.017*

  1. Note: *P < 0.05, **P < 0.01
  2. BMI body mass index, ASA American Society of Anesthesiologists, Hct hematocrit, Hb hemoglobin, ALB albumin, PT prothrombin time, APTT activated partial thromboplastin time, PLT platelet, TBL total blood loss, PBV patient’s blood volume, VBL visible blood loss
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X