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Table 2 Univariate and multivariate logistic analysis of risk factors for blood transfusion after hip fracture surgery

From: Preoperative risk factors for postoperative blood transfusion after hip fracture surgery: establishment of a nomogram

  Univariate Multivariate
OR (95% CI) P OR (95% CI) P
Age (year) 1.07 (1.044-1.09) < 0.01* 1.03 (1.01-1.06) 0.02*
Sex     
 Female Ref.   Ref.  
 Male 0.53 (0.33-0.84) 0.01* 1.08 (0.56-2.10) 0.82
BMI (kg/m2) 0.90 (0.84-0.96) < 0.01* 0.92 (0.85-1.01) 0.06
Hb (g/L) 0.92 (0.90-0.93) 0.01* 0.92 (0.90-0.94) < 0.01*
TXA     
 No 2.28 (1.45-3.57) < 0.01* 1.92 (1.11-3.34) 0.02*
 Yes Ref.   Ref.  
Type of anesthesia     
 GA 1.28 (0.84-1.96) 0.25 2.08 (1.21-3.57) < 0.01*
 CSEA Ref.   Ref.  
Waiting time (d) 1.11 (1.01-1.21) 0.04* 0.93 (0.82-1.04) 0.19
Hypertension     
 No Ref.   Ref.  
 Yes 1.33 (0.86-2.05) 0.19 1.14 (0.66-1.96) 0.65
Diabetes     
 No Ref.   Ref.  
 Yes 1.79 (1.07-2.97) 0.03* 1.55 (0.83-2.92) 0.17
Smoking     
 No Ref.   Ref.  
 Yes 0.49 (0.26-0.92) 0.03* 0.55 (0.22-1.41) 0.22
Alcohol     
 No Ref.   Ref.  
 Yes 0.60 (0.33-1.08) 0.09 1.10 (0.45-2.73) 0.83
Surgical approach     
 HA Ref.   Ref.  
 IF 0.92 (0.56-1.52) 0.75 1.62 (0.45-5.78) 0.46
Type of fracture     
 FNF Ref.   Ref.  
 ITF 0.62 (0.38-1.02) 0.06 0.51 (0.14-1.85) 0.30
  1. Abbreviations: BMI body mass index, Hb hemoglobin, TXA tranexamic acid, GA general anesthesia, CSEA combined spinal and epidural anesthesia, HA hip arthroplasty, IF internal fixation, FNF femoral neck fracture, ITF inter-trochanteric fracture
  2. *: Statistically significant difference