Table 2 Summary of methodological quality based on PEDro classification scale
Study | Item | Total | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | ||
Klein and Eek 1990 [13] | ✓ | ✓ | x | ✓ | ✓ | ✓ | ✓ | ✓ | x | ✓ | ✓ | 9 |
Soriano and Rios 1998 [14] | ✓ | ✓ | x | ✓ | x | x | x | ✓ | x | ✓ | ✓ | 6 |
Basford et al. 1999 [15] | ✓ | ✓ | x | ✓ | ✓ | ✓ | x | ✓ | x | ✓ | ✓ | 8 |
Gur et al. 2003 [16] | ✓ | ✓ | x | ✓ | ✓ | x | x | ✓ | x | ✓ | ✓ | 7 |
Djavid et al. 2007 [17] | ✓ | ✓ | x | ✓ | ✓ | ✓ | x | ✓ | x | ✓ | ✓ | 8 |
Vallone et al. 2014 [18] | ✓ | ✓ | ✓ | ✓ | x | x | x | ✓ | x | ✓ | ✓ | 7 |
Hsieh et al. 2014 [12] | ✓ | ✓ | ✓ | ✓ | ✓ | x | ✓ | ✓ | x | ✓ | ✓ | 9 |