Table 1 Patient characteristics.

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

Female gender

%

53.6

Age (years)

Median (IQR)

66 (58–76)

BMI (kg/m2)

Median (IQR)

27.9 (24.9–32.0)

ASA

I

n (%)

24 (7.8)

II

n (%)

214 (69.5)

III

n (%)

66 (21.4)

IV

n (%)

3 (1.0)

MET

< 5

n (%)

126 (46.7)

≥ 5

n (%)

144 (53.3)

Surgery

Total hip arthroplasty

n (%)

202 (65.6)

Total knee arthroplasty

n (%)

79 (25.6)

unicondylar arthroplasty

n (%)

25 (8.1)

Wave

n (%)

2 (0.6)

Anticoagulation

No anticoagulation

n (%)

221 (71.8)

Platelet inhibitor

n (%)

49 (15.9)

DOAC

n (%)

27 (8.8)

Phenprocoumon

n (%)

11 (3.6)

Drain inserted

n (%)

136 (44.2)

Use of tranexamic acid

n (%)

118 (38.3)

  1. BMI body mass index, ASA American Society of Anesthesiologists grade, MET Metabolic Equivalent of Task score.
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