Table 1.
Characteristics of the included studies.
| First Author | Year | Country | Study type | Approach | Cases | Age (yr) | Male | BMI (kg/m2) | Malignant | Tumor size (mm) | ASA (1/2/3/4) | NOS |
| Tranchart | 2014 | France | Retro/ | RH | 28 | 66.5 (42–84) | 13 | 26.1 (16.7–36) | 15 | 35 (6–115) | 5/14/9 | 7 |
| Comparative | LH | 28 | 66 (41–78) | 13 | 23.2 (16–33) | 17 | 40 (6–130) | 5/19/4 | ||||
| Salloum | 2016 | France | Retro/ | RLLS | 16 | 56 ± 15 | 8 | 27 ± 5 | 9 | 56 < 2,24 > 2 | 7 | |
| Case-control | LLLS | 80 | 58 ± 16 | 38 | 26 ± 5 | 48 | 10 < 2,6 > 2 | |||||
| Montalti | 2015 | Italy | Retro/ | RPS | 36 | 62 ± 13 | 21 | NA | 26 | 44.4 ± 30.6 | 3/19/13 | 7 |
| Comparative | LPS | 72 | 56.8 ± 15 | 39 | NA | 50 | 49.5 ± 35 | 10/42/20 | ||||
| Berber | 2010 | USA | Retro/ | RH | 9 | 66.6 ± 6.4 | 7 | NA | 7 | 32 ± 13 | NA | 9 |
| Comparative | LH | 23 | 66.7 ± 9.6 | 12 | NA | 21 | 29 ± 13 | NA | ||||
| Minggen HU | 2019 | China | Retro/ | RLLS | 58 | 52.2 ± 13.8 | 33 | 24.7 ± 4.0 | 31 | 47 ± 26 | 2/54/2 | 8 |
| Case-control | LLLS | 54 | 48.9 ± 13.1 | 26 | 23.8 ± 3.2 | 26 | 47 ± 28 | 5/48/1 | ||||
| Kim | 2016 | Korea | Retro/ | RLLS | 12 | 54.1 ± 12.2 | 6 | NA | 7 | 23 (20–36) | NA | 8 |
| Case-contro | LLLS | 31 | 56.4 ± 11.6 | 18 | NA | 24 | 24 (17–30) | NA | ||||
| O’Connor | 2017 | USA | Retro/ | RH | 39 | NA | NA | NA | NA | 40 (17–110) | NA | 7 |
| Comparative | LH | 50 | NA | NA | NA | NA | 4 (10–95) | NA | ||||
| Lai | 2013 | China | Retro/ | RH | 33 | NA | NA | NA | NA | NA | NA | 7 |
| Comparativel | LH | 33 | NA | NA | NA | NA | NA | NA | ||||
| Lee | 2015 | China | Retro/ | RLLS | 38 | 58.5 (20–81) | 26 | NA | 27 | 30 (11–120) | 4/31/3 | 8 |
| Case-control | LLLS | 29 | 60 (34–80) | 15 | NA | 23 | 30 (15–70) | 6/26/3 | ||||
| Croner | 2016 | Germany | Retro/ | RH | 10 | 64 (45–76) | 8 | 28 (28.3) | 10 | NA | 1 4/4 | 8 |
| Case-control | LH | 19 | 59 (32–85) | 13 | 26 (26.6) | 15 | NA | 2/7/9/1 | ||||
| Ruoyu | 2018 | China | Retro/ | RLLS | 7 | NA | NA | NA | NA | NA | NA | 7 |
| Comparativel | LLLS | 17 | NA | NA | NA | NA | NA | NA | ||||
| Packiam | 2012 | USA | Retro/ | RLLS | 11 | 57 ± 16 | 3 | 31 ± 7 | 6 | 55 (24–65) | NA | 7 |
| Comparative | LLLS | 18 | 52 ± 17 | 4 | 29 ± 7 | 8 | 44 (26–71) | NA |