Methodological Quality
In total, five RCTs were captured from the included studies, two of
which were of good methodological quality (level 1b evidence; PEDro=7
and 8, respectively (31, 37), and two were fair (level 2 evidence;
PEDro=5; (30, 40). The RCT conference abstract was of unknown quality,
as a PEDro score could not be calculated with the information reported
(38). Four prospective controlled trials (PCTs) provided level 2
evidence (25, 27, 28, 32). Three pre-post studies (26, 29, 36), and
three post-test studies (24, 35, 39) provided level 4 evidence; finally,
two case reports (33, 34) provided level 5 evidence.