Table 2. Variables related to the musical practice of participants in the studies included in the systematic review and meta-analysis.
| Study | Professional musicians | Groups | Age of onset | Years of training | Years of practice | Current practice (%) | Current practice (h/week) |
|---|---|---|---|---|---|---|---|
| Baird et al., 2017 | Yes | – | – | – | 51 (22) | 100% | – |
| Bidelman & Alain, 2015 | No | – | 10.8 (2.5) | 11.4 (5.8) | – | 100% | – |
| Fauvel et al., 2014; Study 1 | No | Older musicians | 11.2 (4.5) | – | Overall: | 100% | 9.2 (6.6) |
| Middle-aged musicians | 8.4 (3.7) | – | 38.12 (17.7) | 100% | 15.3 (12.6) | ||
| Fauvel et al., 2014; Study 2 | No | Older musicians with early onset | 11.2 (4.5) | – | – | 100% | 9.2 (6.6) |
| Older musicians with late onset | 42.7 (11) | – | 25.8 (12.3) | 100% | 8.1 (7.2) | ||
| Grassi et al., 2017 | Yes | – | – | – | 60.3 (9.96) | 100% | – |
| Hanna-Pladdy & Gajewski, 2012 | No | – | 9.3 | 4 | 37 | 51.5% | – |
| Hanna-Pladdy & MacKay, 2011 | No | High activity musicians | 9.7 (7.2) | 3.5 (0.96) | 35.5 (24.7) | 45.5% | – |
| Low activity musicians | 10.4 (5.9) | 3.3 (0.95) | 3.8 (2.7) | 11.1% | – | ||
| Mansens et al., 2017 | – | – | – | – | – | – | – |
| Moussard et al., 2016 | Professionals and amateurs | – | 8.8 (3.8) | 27.8 (19.5) | 57.2 (8.4) | 100% | 11 (6.3) |
| Strong & Midden, 2018 | – | Active musicians | 8.4 (3.4) | 9.5 (6.4) | – | 100% | 7.9 (6.8) |
| Former musicians | 8.6 (2.2) | 7.9 (5.3) | – | – | – |