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Table 2 Operative time (min)

From: Open versus minimally invasive TLIF: literature review and meta-analysis

Author

MITLIF

OTLIF

Mean

SD

Nr. of Pat.

Mean

SD

Nr. of Pat.

Zhang et al. 2017 [14]

146

± 15

48

136

± 25

59

Yang et al. 2017 [15]

179.0

± 20.7

21

141.8

± 18.8

20

Tschugg et al. 2017 [16]

173.4

± 71

19

208.8

± 86

48

Kulkarni et al. 2016 [17]

204

± 32.4

36

177.6

± 34.2

25

Hey et al. 2015 [18]

366.3

–

25

252.5

–

25

Wong et al. 2014 [22]

123

–

144

225

–

54

Sulaiman et al. 2014 [13]

375

± 14

57

161

± 7.6

11

Singh et al. 2014 [23]

115.8

± 28.2

33

186.0

± 31.0

33

Gu et al. 2014 [24]

195.5

± 28.0

44

186.6

± 23.4

38

Brodano et al. 2013 [25]

144

–

30

102

–

34

Seng et al. 2013 [26]

185

± 8.7

40

166

± 7

40

Cheng et al. 2013 [27]

244.6

± 73.0

50

278.8

± 14.5

25

Parker et al. 2013 [30]

274

–

50

229

–

50

Adogwa et al. 2012 [31]

235

± 88.36

14

211

± 43.23

7

Wang et al. 2012 [32]

127

± 25

42

168

± 37

39

Pelton et al. 2012 [33]

113

± 32.30

33

184.5

± 33.94

33

Lee et al. 2012 [6]

166.4

± 52.1

72

181.8

± 45.4

72

Parker et al. 2012 [34]

300

–

15

210

–

15

Lau et al., 2010 [35]

389.67

–

10

365.30

–

12

Adogwa et al. 2010 [36]

300

–

15

210

–

15

Wang et al. 2010 [37]

139

± 27

25

143

± 35

27

Villavicen et al. 2010 [42]

222.5

± 67.5

76

214.9

± 60

63

Shunwu et al. 2009 [38]

159.2

± 21.7

32

142.8

± 22.5

30

Wang et al. 2010 [37]

156

± 32

42

145

± 27

43

Peng et al. 2009 [39]

216.4

–

29

170.5

–

29

Dhall et al. 2008 [26]

199

–

21

237

–

21

Schizas et al. 2008 [41]

348

–

18

312

–

18

  1. MITLIF minimally invasive transforaminal lumbar interbody fusion, OTLIF open transforaminal lumbar interbody fusion, SD standard deviation, Nr number, Pat patients