Table 2.

Assessment of methodological quality using the PEDro scale.

Quality metric	Aily et al [52]	Huang et al [34]	O’Moore et al [33]	Allen et al [35]	Rini et al [51]	Bossen et al [53]
Eligibility criteria	Yes	Yes	Yes	Yes	Yes	Yes
Random allocation	Yes	Yes	Yes	Yes	Yes	Yes
Concealed allocation	Yes	Yes	Yes	Yes	Yes	Yes
Baseline comparability	Yes	Yes	Yes	Yes	Yes	Yes
Blinded subjects	No	No	No	No	No	No
Blinded therapists	No	No	No	No	No	No
Blinded assessors	No	Yes	Yes	Yes	Yes	No
Adequate follow up	Yes	Yes	Yes	Yes	Yes	No
Intention-to-treat analysis	No	No	Yes	Yes	Yes	Yes
Between-group comparisons	Yes	Yes	Yes	Yes	Yes	Yes
Point estimates and variability	Yes	Yes	Yes	Yes	Yes	Yes
Total scorea	6	7	8	8	8	6
Quality assessment	Good	Good	Good	Good	Good	Good

^aEligibility criteria did not contribute to the total score: 1=yes, 0=no.