Jales Junior 2015

Methods	Parallel RCT
Participants	Country of study: Brazil Setting: laboratory Condition: fibromyalgia Prior management details: continued using pharmacological and nonpharmacological therapies. n = 20 Age mean (SD): 46.4 (10.62) years Duration of symptoms: not reported Gender distribution: all F
Interventions	Stimulation type: tDCS Stimulation parameters: intensity 1 mA, 15 cm2 electrodes, duration 20 min Stimulation location: anode ‐ M1 L, cathode right supraorbital Number of treatments: x 1 per week for 10 weeks Control type: sham tDCS
Outcomes	Primary: pain VAS; anchors not reported When taken: postintervention Secondary: FIQ, SF‐36
Notes	No reporting of sources of support or COI
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Comment: method of randomisation not reported
Allocation concealment (selection bias)	Unclear risk	Comment: no reporting of concealment procedures
Adequate blinding of participants?	Low risk	Quote “Patients, as well as investigator in charge and evaluators, were blind to the nature of applied stimulation” Comment: blinding likely at 1 mA intensity
Adequate blinding of assessors?	Low risk	Quote “Patients, as well as investigator in charge and evaluators, were blind to the nature of applied stimulation” Comment: blinding likely at 1 mA intensity
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Comment: attrition not reported
Selective reporting (reporting bias)	Low risk	Comment: results reported adequately
Study Size	High risk	Comment: n = 20
Study duration	High risk	Comment: postintervention follow‐up only
Other bias	Unclear risk	Comment: no reporting of baseline comparability