Table 3 Factors influencing red blood cell (RBC) transfusions. Values are given as median (interquartile range).

From: Predictors for blood loss and transfusion frequency to guide blood saving programs in primary knee- and hip-arthroplasty

 

RBC transfusion, n = 12

No RBC transfusion, n = 296

p

Age (years)

83 (64–85)

66 (58–76)

0.009

BMI (kg/m2)

24.2 (22.5–28.0)

28.0 (25.0–32.2)

0.006

Preoperative hemoglobin (g/dL)

11.7 (11.0–12.6)

13.9 (12.7–14.8)

< 0.001

Hemoglobin level on POD 1 (g/dL)

7.5 (7.0–9.4)

11.0 (10.2–11.9)

< 0.001

Hemoglobin level on POD 3–5 (g/dL)

6.6 (6.3–8.3)

9.7 (8.2–11.0)

0.001

Maximum drop in hemoglobin (g/dL)

4.8 (4.2–5.8)

3.9 (2.6–4.8)

0.036

Drop in hemoglobin between preoperative value and POD 1 (g/dL)

3.4 (2.7–5.0)

2.7 (1.8–3.7)

0.037

Hospitalization after operation (days)

7.0 (6.3–7.8)

6.0 (5.0–7.0)

0.12

  1. POD postoperative day.
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