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Table 1 Baseline Characteristics

From: The efficacy and safety of tranexamic acid in rheumatoid arthritis patients undergoing simultaneous bilateral total knee arthroplasty: a multicenter retrospective study

Demographics

Control group (n = 24)

TXA group (n = 50)

p

Age

60.3 ± 9.8

56.6 ± 15.2

0.209

Gender(male/female)

5/19

11/39

0.909

Height (cm)

159.88 ± 4.89

159.12 ± 7.54

0.656

Weight (kg)

64.1 ± 9.03

64.3 ± 11.8

0.943

BMI(kg/m2)

25.1 ± 3.48

25.3 ± 3.86

0.805

Range of motion (°)

94.71 ± 13.44

93.70 ± 13.41

0.744

Flexion contractures(n)

18

33

0.289

PBV (mL)

3831.8 ± 410.7

3845.2 ± 621.6

0.913

Anesthesia method (n)

  

0.196

General anesthesia

22

38

 

Regional anesthesia

2

12

 

ASA class (n)

  

0.560

1

8

15

 

2

13

32

 

3

3

3

 

4–5

0

0

 

Hypertension (n)

3

11

0.329

Diabetes (n)

3

4

0.845

Osteoporosis (n)

0

4

0.381

Preoperative values

   

Hb(g/L)

129.4 ± 17.7

128.6 ± 15.4

0.852

Hct

0.374 ± 0.092

0.373 ± 0.041

0.982

Drainage use (n)

15

34

0.640

Tourniquet use (n)

17

40

0.380

  1. The continuous value was given as the mean and the standard deviation. The categorical values are given as the number of patients. TXA: tranexamic acid; BMI: Body mass index = Weight/Height2; PBV: Patient blood volume; ASA: American Society of Anesthesiologists; Hb: Hemoglobin; Hct: Hematocrit