Table 1. Characteristics of studies included in the meta-analysis.
| Study | Year | Language | Country | Age range (mean) | Groups | n | Years of onset |
|---|---|---|---|---|---|---|---|
| Bittner et al. (12) | 2018 | English | USA | 55.9±11.7 | R-IHR | 83 | 2015–2016 |
| L-IHR | 83 | ||||||
| Huerta et al. (13) | 2019 | English | USA | 59.1±12.5 | R-IHR | 71 | 2005–2017 |
| L-IHR | 128 | ||||||
| Khoraki et al. (14) | 2020 | English | USA | 49.8±13.5 | R-IHR | 45 | 2015–2017 |
| L-IHR | 138 | ||||||
| Kudsi et al. (15) | 2017 | English | USA | 56.9±15.1 | R-IHR | 118 | 2012–2015 |
| L-IHR | 157 | ||||||
| Muysoms et al. (16) | 2018 | English | USA | 59.7±14.2 | R-IHR | 49 | 2013–2017 |
| L-IHR | 64 | ||||||
| Sheldon et al. (17) | 2019 | English | USA | 39.5±11.5 | R-IHR | 49 | 2016–2018 |
| L-IHR | 34 | ||||||
| Spernat et al. (7) | 2014 | English | USA | 59.2±10.2 | R-IHR | 5 | 2004–2010 |
| L-IHR | 33 | ||||||
| Waite et al. (18) | 2016 | English | USA | 57.8±11.5 | R-IHR | 39 | 2012–2014 |
| L-IHR | 24 |
R-IHR, robotic inguinal hernia repair; L-IHR, laparoscopic inguinal hernia repair.