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Table 1 Characteristics of included studies

From: Laparoendoscopic single-site varicocelectomy compared with conventional laparoscopic surgery: a systematic review and meta-analysis

References

Design

Number of patients

Level of evidence

Multichannel port for LESS

Quality score (failing items)

NOS score (max: 9)

LESS-V

CTL-V

Bansal et al. (2014)

Retrospective case control study

11

32

3b

TriPort

5

Friedersdorff et al. (2013)

Retrospective case control study

20

79

3b

X-cone

6

Lee et al. (2012)

RCT

39

43

2b

Home-made

6 (BC)

Marte et al. (2014)

Retrospective case control study

44

25

4

SILS

5

Wang et al. (2014)

RCT

44

43

2b

Home-made

6 (BC)

Youssef and Abdalla (2015)

RCT

41

39

2b

SILS

6 (BC)

  1. Quality items of RCTs according to Cochrane risk-of-bias tool (score range 0–8): A—adequate method of sequence generation, B—blinding of participants performed, C—blinding of personnel performed, D—blinding of assessors performed, E—allocation concealment adequate, F—adequate assessment of each outcome, G—selective outcome reporting avoided, H—intention-to-treat analysis of results