Naylor 2010.

Study characteristics
Methods	11 weeks plus 120 days' duration, randomised, standard care, controlled trial. Assessments at baseline, post intervention, 4 months, and 8 months post intervention
Participants	Chronic pain condition: chronic musculoskeletal pain 55 participants randomised, 51 participants received allocated intervention Female 44, male 7 Mean age 46 (SD ± 11.5) years
Interventions	All participants received 11 90‐min sessions of CBT pre‐randomisation Therapeutic Interactive Voice Response (n = 26) Standard care (n = 25)
Outcomes	Prescribed medication use: dose and frequency of opioid analgesics, non‐steroidal anti‐inflammatory drugs, benzodiazepines, and antidepressants Pain: Short Form MPQ, Pain Symptoms sub scale from the TOPS Psychological function: BDI, SF‐36 Mental Function Scale, CSQ Physical function: SF‐36 Physical Function Scale, TOPS Total Pain Experience Scale
Notes	4 participants were excluded following randomisation. This research was supported by grants from the National Institute of Drug Addiction (NIDA) R21 DA016115, National Institute of Arthritis, Musculoskeletal Diseases (NIAMS) R01 AR052131, and National Institute on Alcohol Abuse and Alcoholism (NIAAA) R01 AA014270.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	"Randomized using a stratified block design"
Allocation concealment (selection bias)	Low risk	"consecutively numbered, sealed envelopes were prepared for each gender group by the statistician"
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not described
Incomplete outcome data (attrition bias) All outcomes	Low risk	No dropouts during the study
Selective reporting (reporting bias)	Low risk	Comprehensive reporting of outcomes
Size	High risk	25/26 per group