Efficacy of EMG- and EEG-Biofeedback in Fibromyalgia Syndrome: A Meta-Analysis and a Systematic Review of Randomized Controlled Trials

Table 2

Methodological quality.

Study	Adequate randomization	Adequate allocation	Blinding of assessor	Intention to treat analysis
Babu et al. [34]	NR^1	NR	NR	Yes
Buckelew et al. [33]	NR	Yes	NR	No
Ferraccioli et al. [35]	No	NR	NR	Yes
Kayiran et al. [39]	NR	NR	Yes	NR
Kravitz et al. [36]	Yes	NR	NR	Yes
Nelson et al. [38]	NR	Yes	NR	No
Van Tulder et al. [8]	NR	NR	NR	No

1Not reported.