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Table 2 Summary of study characteristics

From: Cervical disc arthroplasty (CDA) versus anterior cervical discectomy and fusion (ACDF) in symptomatic cervical degenerative disc diseases (CDDDs): an updated meta-analysis of prospective randomized controlled trials (RCTs)

Studies

Design

Prostheses

Country

Center

No (CDA/ACDF)

Age(CDA/ACDF)

Male % (CDA/ACDF)

Follow up (%)

Zhang et al. (2012)

RCT

Bryan (Medtronic Sofamor Danek, Memphis, TN, USA)

China

Multicenter

120

60/60

44.8/45.6

58.3/53.3

NA

Sasso et al. (2007, 2008, 2011), Heller et al. (2009), Riew et al. (2008)

RCT

Bryan (Medtronic Sofamor Danek, Memphis, TN, USA)

USA

Multicenter

463

242/221

44.4/44.7

45.5/55.1

73

 

RCT

Bryan (Medtronic Sofamor Danek, Memphis, TN, USA)

USA

Multicenter

199

106/93

44.5/44.4

17.0/16.1

NA

Cheng et al. (2009, 2011)

RCT

Bryan (Medtronic Sofamor Danek, Memphis, TN, USA)

USA

Singlecenter

83

41/42

47.2/47.7

51.2/54.8

98

Skeppholm et al. (2015)

RCT

Discover (DePuy Spine, Raynham, MA, USA)

Sweden

Multicenter

153

73/80

42.2/41.7

49.4//47.1

91

Rozankovic et al. (2014)

RCT

Discover (DePuy Spine, Raynham, MA, USA)

Croatia

Singlecenter

101

51/50

41/41

49.0/50.0

100

Qizhi et al. (2014)

RCT

Discover (DePuy Spine, Raynham, MA, USA)

China

Singlecenter

30

14/16

47/48

64.2/68.8

100

Coric et al. (2011)

RCT

Kineflex (Spinal Motion Inc, Mountain View, CA, USA)

USA

Multicenter

269

136/133

43.7/43.9

37.5/44/4

87

Zhang et al. (2014)

RCT

Mobi-C (LDR Medical, Troyes, France)

USA

Multicenter

111

55/56

44.8/46.7

45.5/46.4

NA

Hisey et al. (2014, 2015)

RCT

Mobi-C (LDR Medical, Troyes, France)

USA

Multicenter

245

164/81

43/44

47.6/44.4

75

Davis et al. (2013, 2015)

RCT

Mobi-C (LDR Medical, Troyes, France)

USA

Multicenter

330

225/105

45.3/46.2

50.2/42.9

86

Phillips et al. (2013, 2015)

RCT

PCM (NuVasive Inc, San Diego, CA, USA)

USA

Multicenter

293

163/130

45.3/43.7

52.8/51.9

72.70

McAfee et al. (2010)

RCT

PCM (NuVasive Inc, San Diego, CA, USA)

USA

Multicenter

251

151/100

45/44

50.3/47.0

NA

Riina et al. (2008)

RCT

Prestige ST (Medtronic Sofamor Danek, Memphis, TN, USA)

USA

Singlecenter

19

10.0/9.0

40.8/38.1

20.0/33.3

84.20

Riew et al. (2008)

RCT

Prestige ST (Medtronic Sofamor Danek, Memphis, TN, USA)

USA

Multicenter

111

59/52

43.4/46.0

49.2/40.4

NA

Porchet and Metcalf (2004)

RCT

Prestige II (Medtronic Sofamor Danek, Memphis, TN, USA)

Switzerland

Multicenter

55

27/28

44.3/43.2

63.0/40.4

67.3

Mummaneni et al. (2007), Burkus et al. (2010, 2014)

RCT

Prestige ST (Medtronic Sofamor Danek, Memphis, TN, USA)

USA

Multicenter

541

276/265

43.3/43/9

46.4/46

77.80

Nabhan et al. (2007a, b, c, 2011)

RCT

ProDisc-C (Synthes Inc, West Chester, PA,USA)

Germany

Singlecenter

41

20/21

44

23/18

NA

Murrey et al. (2008, 2009), Delamarter et al. (2010), Kelly et al. (2011), Kesman et al. (2012), Zigler et al. (2013), Delamarter and Zigler (2013)

RCT

ProDisc-C (Synthes Inc, West Chester, PA,USA)

USA

Multicenter

209

103/106

42.1/43/5

44.7/46.2

95.20

Vaccaro et al. (2013)

RCT

SECURE-C (Globus Medical, Audubon, PA, USA)

USA

Multicenter

380

236/144

43.4/44.4

53.6/48.6

87.10

  1. CDA cervical disc arthroplasty, ACDF anterior cervical discectomy and fusion, RCT randomized controlled trial, NA no available