Methodological rigour of the included studies using the McMaster Critical Review Form for Quantitative Studies [35,36] and the PEDro Scale [38].

1 = criteria fulfilled completely, 0 = criteria not fulfilled completely

Quality category: poor (≤8), fair (9–10), good (11–12), very good (13–14), and excellent (15–16) [31],

✓ = criterion fulfilled, x = criterion not fulfilled, na not appropriate

Methodological rigour of the included studies using the McMaster Critical Review Form for Quantitative Studies [35,36] and the PEDro Scale [38].