Efficacy of therapeutic ultrasound vs sham ultrasound on pain and physical function in people with knee osteoarthritis: A meta-analysis of randomized controlled trials

Table 4 Methodological quality assessment of the randomized sham-controlled trials

Ref.	Random Sequence Generation	Allocation Concealment	Blinding of Participant	Blinding of Care Provider	Blinding of Assessor	Data Collection Complete	Complete Outcome Reporting	Free of Other Potential Bias	Risk of Bias1
Falconer et al[18]	Unclear	Unclear	Yes	No	Yes	Yes	No	Yes	High
Ozgönenel et al[19]	Unclear	Unclear	Yes	No	Yes	Unclear	Yes	Yes	High
Tascioglu et al[20]	Unclear	Unclear	Yes	No	Yes	Unclear	Yes	Yes	High
Yang et al[21]	Unclear	Unclear	Unclear	Unclear	Unclear	Yes	No	No	High
Loyola-Sánchez et al[22]	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Low
Ulus et al[23]	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	High

¹Overall risk of bias for each study assessed as Low if has a Yes answer for ALL the items or as High if has NO or Unclear answer for one or more items.