Table 1 Characteristics and quality scores of included studies

Chen et al.

2022

China

OCS (P)

2018.03-2020.02

RTAG

48

61.3 ± 9.3^a

38/10

22.3 ± 2.7^a

4.4 ± 2.6^a

D2

6

2015.01-2018.12

LTAG

96

61.6 ± 7.6^a

79/17

22.3 ± 3.2^a

4.5 ± 2.1^a

D2

Hikage et al.

2022

Japan

OCS (R)

2013.10-2020.12

RTAG

36

72 (43–84)^b

26/10

23.1 (18.1–30.1)^b

NA

D1+/D2

9

2013.10-2020.12

LTAG

58

71 (36–86)^b

46/12

22.8 (16.2–35.5)^b

NA

D1+/D2

Jia et al.

2023

China

OCS (R)

2014.10-2021-10

RTAG

147

62.92 ± 10.00^a

118/29

24.97 ± 3.70^a

5.07 ± 2.69^a

D2

8

2014.10-2021-10

LTAG

371

62.52 ± 9.43^a

294/77

24.54 ± 3.35^a

5.03 ± 2.80^a

D2

Roh et al.

2021

Korea

OCS (R)

2009.01-2018.12

RTAG

74

53.8 ± 11.6^a

42/32

23.6 ± 2.9^a

3.5 ± 1.7^a

D1+/D2

9

2009.01-2018.12

LTAG

74

54.6 ± 12.7^a

42/32

23.8 ± 3.4^a

3.5 ± 2.6^a

D1+/D2

Shibasaki et al.

2022

Japan

OCS (R)

2009.01-2021.06

RTAG

100

69 (60–75)^c

69/31

23.0 (20.3–25.3)^c

6.0 (2.7–7.3)^c

D1+/D2

8

2009.01-2021.06

LTAG

100

68 (61–75)^c

67/33

23.1 (21.1–25.3)^c

5.0 (3.0-7.5)^c

D1+/D2

Son et al.

2014

Korea

OCS (R)

2003.05-2010.12

RTAG

51

55.3 ± 12.2^a

23/28

22.7 ± 2.9^a

3.04 ± 1.33^a

D2

9

2003.05-2010.12

LTAG

58

58.8 ± 12.2^a

36/22

23.2 ± 3.3^a

3.17 ± 1.95^a

D2

Wang et al.

2022

China

OCS (R)

2016.07-2020.12

RTAG

115

60.4 ± 9.4^a

91/24

22.5 ± 3.0^a

4.41 ± 2.38^a

D2

8

2016.07-2020.12

LTAG

230

60.3 ± 10.4^a

179/51

22.4 ± 3.0^a

4.35 ± 2.50^a

D2

Ye et al.

2019

China

OCS (R)

2015.06-2018.10

RATG

99

58.7 ± 6.7^a

58/41

23.9 (17.3–28.6)^b

NA

D2

7

2015.06-2018.10

LATG

106

59.0 ± 7.3^a

55/51

23.9 (19.9–28.3)^b

NA

D2

Yoon et al.

2012

Korea

OCS(R)

2009.02-2011.05

RATG

36

53.9 ± 11.7^a

18/18

23.2 ± 2.5^a

NA

D1+/D2

8

2009.02-2011.05

LATG

65

56.9 ± 12.3^a

31/34

23.6 ± 3.4^a

NA

D1+/D2