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Table 1 General characteristic of the included studies

From: Is unilateral pedicle screw fixation superior than bilateral pedicle screw fixation for lumbar degenerative diseases: a meta-analysis

Author

Country

No. of patients (n)

Mean age (years)

Follow-up (month)

Type of operation

Surgical segments

Unilateral

Bilateral

Unilateral

Bilateral

Unilateral

Bilateral

Aoki [9]

Japan

25

25

66.2

65.6

31

31.2

TLIF, capstone cage, autograft

1-segment

Choi [10]

South Korea

26

27

53.4

56.2

27.5

28.9

TLIF, capstone cage, autograft

1-segment

Duncan [11]

USA

46

56

53.5

55.7

25.1

25.1

TLIF, PEEK cage, autograft/allograft

1-segment

Feng [12]

China

20

20

53.8

53.2

24

24

TLIF, capstone cage, autograft

1-segment

Fernandez-Fairen [13]

Spain

40

42

61.4

60.8

55.6

59.7

Cage, autograft

1-segment, 2-segments

Lin [14]

China

43

42

67

65.5

26

26

MIS-TLIF, capstone cage, autograft

1-segment

Xie [15]

China

56

52

56.2

55

36

36

TLIF, capstone cage, autograft

1-segment, 2-segments

Xue [16]

China

37

43

57.1

58.2

25.3

25.3

TLIF, capstone cage, autograft

1-segment, 2-segments

Zhang [17]

China

33

35

59.4

55.7

12

12

TLIF, capstone cage, autograft

2-segments

Shen [18]

China

31

34

57.3

58.9

26.6

26.6

MIS-TLIF, capstone cage, autograft

1-segment

Dong [19]

China

20

19

54

56.6

24

24

PLIF, capstone cage, autograft

1-segment

Dahdaleh [20]

USA

16

20

62.2

57.3

12.4

12.4

MIS-TLIF, capstone cage, autograft

1-segment

  1. TLIF transforaminal lumbar interbody fusion, MIS-TIF minimally invasive transforaminal lumbar interbody fusion