Sartory 1998.

Study characteristics
Methods	RCT. 3 arms. Assessed at pretreatment, post‐treatment (4 weeks after end of intervention), 8 months follow‐up
Participants	End of treatment: n = 43 Start of treatment: n = 43 Sex: 17 F, 26 M Mean age = 11.3 years (SD 2.1) Source = outpatient clinic of paediatric hospital and advertising in press Diagnosis = migraine Mean years of pain = 4.6
Interventions	"Cephalic vasomotor training + stress management" "Relaxation training + stress management" "Beta‐blocker (metoprolol)"
Outcomes	Primary pain outcome: headache index Primary disability outcome: none Primary depression outcome: mood faces scale Primary anxiety outcome: none Headache index Episodes/week when analgesics taken Mood faces scale, 5‐point smiling ‐ upset
Notes	COI: not reported Funding: "This study was supported by the Bundesminister fuÈ r Forschung und Technologie (BMFT; Federal Minister for Research and Technology, Germany)."
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	"Children were allocated randomly to one of three treatment groups" Comment: probably done, no method described
Allocation concealment (selection bias)	Unclear risk	No description found in text Comment: probably not done
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No description found in text Comment: probably not done
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Attrition was described, however significant differences between completers and non‐completers were not described
Selective reporting (reporting bias)	Low risk	Data were fully reported