Wahlund 2003.

Study characteristics
Methods	RCT. 3 arms. Assessed at pretreatment, post‐treatment, and 6 months
Participants	End of treatment: n = 110 Start of treatment: n = 122 (BI + RT = 41; BI + OA = 42; BI = 39) Sex: 93 F, 29 M Mean age = 15.3 years (SD 2.0) Source = TMD clinic in Linköping, Sweden Diagnosis = temporomandibular disorders Mean years of pain = unknown
Interventions	"Brief Information + Relaxation training (BI + RT)"* "Brief Information + Occlusal appliance (BI + OA)" "Brief Information"* *For the purposes of this review, we excluded only BI + RT (treatment) and BI (control)
Outcomes	Primary pain outcome: pain intensity Primary disability outcome: none Primary depression outcome: none Primary anxiety outcome: none Pain intensity Pain frequency Pain Index Pain diary Clinical significance Subjective evaluation of treatment Analgesic consumption School absence Research diagnostic criteria for temporomandibular disorders Treatment motivation and credibility Pressure pain threshold
Notes	COI: not reported Funding: "The study was supported by the Public Dental Service of Östergötland (Östergötland's Country Council), Sweden."
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	"The patients were randomly assigned to one of the following 3 treatment groups...." Comment: randomisation procedure unclear
Allocation concealment (selection bias)	Unclear risk	Not described
Blinding of outcome assessment (detection bias) All outcomes	Low risk	"At each evaluation, all subjects filled out a self‐administered questionnaire and were clinically examined by a 'blinded' calibrated clinician." Comment: probably done
Incomplete outcome data (attrition bias) All outcomes	Low risk	Attrition reported, and there were no differences between completers and non‐completers
Selective reporting (reporting bias)	Low risk	All measures were reported