Skip to main content

Table 1 Definition and assignment method of related factors affecting blood loss

From: Hidden blood loss of total knee arthroplasty in hemophilia arthritis: an analysis of influencing factors

Variable

Name

Definition and assignment

Y1

Total blood loss

ml

Y2

Intraoperative blood loss

ml

Y3

Hidden blood loss

ml

X1

BMI

kg/m2

X2

Age

year

X3

Sex

0 = male; 1 = female

X4

Total blood volume

ml

X5

TXA

0 = no TXA; 1 = TXA

X6

Regular FVIII prophylaxis

0 = untreated; 1 = low dose regimen;

2 = medium dose regimen; 3 = high-dose regimen;

X7

HBV

0 = no HBV; 1 = HBV

X8

Preoperative HB

g/L

X9

Postoperative HB

g/L

X10

Preoperative HCT

%

X11

Postoperative HCT

%

X12

FVIII peak level

% or IU·dL−1

X13

FVIII valley level

% or IU·dL−1

X14

Classical IVR

%

X15

Incremental IVR

IU·dL−1/IU·kg− 1

X16

Peak level of FVIII in operation day

% or IU·dL−1

X17

Operation duration

mins

X18

Transfuse blood

0 = no blood transfusion; 1 = blood transfusion

X19

Transfusion quantity of suspended red blood cells

U