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Table 1 Characteristics of included studies

From: Comparison between autologous blood transfusion drainage and closed-suction drainage/no drainage in total knee arthroplasty: a meta-analysis

Study

LOEa

Patients, no.

Surgical method

Agea

M:F ratio

Pre-op Hba

  

A

B

C

 

A

B

C

A

B

C

A

B

C

Amin A 2008 [11]

1b

92

86

—

SU-TKA

70.3

70.4

—

43:49

39:47

—

13.2 (1.2)

13.4(1.3)

—

Zacharopoulos A 2007 [25]

2b

30

30

—

SU-TKA

69.2

70.2

—

6:24

7:23

—

NA

NA

—

Abuzakuk T 2007 [10]

1b

52

52

—

SU-TKA

NA

NA

—

21:31

22:30

—

13.6(1.5)

13.5(1.2)

—

Kirkos JM 2006 [27]

2b

78

77

—

SU-TKA

69.1(5.5)

68.9(5.1)

—

18:60

10:67

—

13.0(1.4)

13.1(1.4)

—

Dramis A 2006 [26]

2b

25

24

—

SU-TKA

NA

NA

—

NA

NA

—

NA

NA

—

Cheng SC 2005 [28]

1b

26

34

—

SU-TKA

72

69.6

—

6:20

12:22

—

12.4

12.8

—

Thomas D 2001 [29]

1b

115

116

—

SU-TKA

NA

NA

—

44:71

55:61

—

NA

NA

—

Adalberth G 1998 [20]

1b

30

30

30

SU-TKA

71(5.4)

72(8)

71(1.3)

NA

NA

NA

13.8(1.1)

14.3(1.3)

14.2(2.6)

Newman J 1997 [30]

2b

35

35

—

SU-TKA

NA

NA

—

NA

NA

—

13.4 ± 1.2

13.2 ± 1.4

—

Heddle NM 1992 [21]

1b

39

40

—

SU-TKA

69.3(6.9)

71(9)

—

25:14

26:14

—

NA

NA

—

Majkowski RS 1991 [31]

1b

20

20

—

SU-TKA

71.3

70.3

—

6:14

6:14

—

13.2

12.7

—

Horstmann W 2014 [33]

1b

59

—

56

SU-TKA

68(9)

—

69(8)

17:24

 

39:17

14(1.4)

—

14(1.4)

Dutton T 2012 [34]

2b

23

—

25

SU-TKA

68.7

—

70.5

10:13

 

10:15

NA

—

NA

Thomassen BJ 2014 [32]

1b

88

—

87

SU-TKA

68.9

—

69.5

NA

NA

NA

14.2

—

14.2

Ritter MA 1994 [35]

2b

128

—

123

SU-TKA

NA

—

NA

NA

NA

NA

13.0

—

13.1

  1. LOE Level of evidence, SU-TKA selective unilateral total knee replacement, B-TKA bilateral total knee replacement
  2. A autologous blood transfusion drainage, B conventional suction drain, C No drainage, NA data not available;. — = without this group ; aMean or Mean(SD)