Characteristics and demographics of included studies
| Study number (%) | |
| Number of retrospective studies | 87/138 (63) |
| Number of prospective studies | 24/138 (17) |
| Number of case studies | 23/138 (17) |
| Randomised controlled trial | 4/138 (3) |
| World region recruitment | |
| Asia | 62/138 (45) |
| North America | 20/138 (14) |
| South America | 23/138 (17) |
| Europe | 28/138 (20) |
| Africa | 3/138 (2.2) |
| Australasia | 2/138 (1.5) |
| Year published | |
| 2013 | 25/138 (18) |
| 2014 | 24/138 (17) |
| 2015 | 15/138 (11) |
| 2016 | 30/138 (22) |
| 2017 | 27/138 (20) |
| 2018 | 11/138 (8) |
| 2019 (prospective only) | 3/138 (2.2) |
| 2020 (prospective only) | 2/138 (1.5) |
| 2021 (prospective only) | 1/138 (0.7) |
| Gender (total 3328) | |
| Male | 2737/3328 (82) |
| Female | 335/3328 (10) |
| Not stated | 256/3328 (7.7) |
| Site of plexus injury per study (n=138) | |
| Upper trunk | 27/138 (20) |
| Lower trunk | 10/138 (7.2) |
| Pan plexus (all avulsed) | 52/138 (38) |
| Infraclavicular | 7/138 (5) |
| Mixture | 35/138 (25) |
| Unclear | 7/138 (5) |
| Interventions (n=138) | |
| Surgical | 118/138 (86) |
| Electrotherapy | 3/138 (2.2) |
| Pain treatments | 11/138 (8) |
| Rehabilitation | 4/138 (2.9) |
| Orthotic | 1/138 (0.7) |
| Stem cell | 1/138 (0.7) |
| Types of surgical intervention (n=118) | |
| Neurotisation | 66/118 (56) |
| Tendon transfer | 8/118 (6.8) |
| Free flap | 17/118 (14) |
| Multiple surgeries | 12/118 (10) |
| Contralateral C7 | 8/118 (6.8) |
| Other | 7/118 (5.9) |