Jensen 2009.

Methods	Randomised controlled clinical trial Study conducted in the USA Randomisation through computer‐generated lists Allocation concealment not described
Participants	Population source: recruited from previously completed survey of study of pain Numbers: randomised 22, self‐hypnosis first 8, self‐hypnosis 7, progressive muscle relaxation 7 Inclusion criteria: diagnosis of MS, at least 18 years old, reported chronic daily pain that was rated as being at least 4/10, on average, on a 0 to 10 numerical rating scale of intensity and indicated on the survey that they would be willing to be contacted about possible participation in future research studies. Exclusion criteria: evidence of severe psychopathology symptoms or psychosis on interview or endorsement of active suicidal ideation with intent within the past 6 months, score of 21 or greater on the Telephone Interview of Cognitive Status indicative of severe cognitive deficits that could potentially interfere with the focused attention required for hypnosis. Age: mean age 51.7 years (27‐75 years) Gender: 16 women, 6 men Type of MS: not reported Pain type: not reported
Interventions	Intervention: self‐hypnosis training Control: progressive relaxation Duration: 10 sessions
Outcomes	Primary outcome NRS Secondary outcomes BPI Amount and effects of hypnosis (pain relief 0 to 10, number of days listened, usual number of times listened, hours of relief they experiences after listening)
Notes	Funding: not reported Conflicts of interest: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Participants were randomly assigned via a computer‐generated list of random numbers
Allocation concealment (selection bias)	Unclear risk	No allocation concealment described
Blinding of participants and personnel (performance bias) All outcomes	High risk	No blinding reported
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Blinding of assessors
Incomplete outcome data (attrition bias) All outcomes	Low risk	Two of the participants did not provide complete data
Selective reporting (reporting bias)	Low risk	All data presented
Other bias	Low risk	No other bias detected