Gibson 2002.

Methods	RCT
Participants	Subject: 79 patients with chronic LBP; 27 male, 52 female. Mean age men: 58.8, female: 63.9. Exclusion criteria: surgery in preceding 12 months, treatment in hospital, over 120 kg., younger than 30 years and history of malignancy.
Interventions	Treatment intervention: 1) Flexible corset (n = not reported) 2) Semi‐rigid corset (n = not reported) Control intervention: 3) lingerie (n = not reported, only female) Treatment use two months. No data on numbers of hours a day.
Outcomes	Pain, back specific functional status, satisfaction, radiographs. After 2 months there are no differences between the corsets. Women rated the lingerie significant better on comfort than the other corsets.
Notes	No data available regarding compliance. 79 were recruited. Comparative data were obtained from 64 patients. No data regarding duration of LBP.
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Unclear risk	Unclear from text
Allocation concealment?	Unclear risk	B ‐ Unclear
Blinding? All outcomes ‐ patients?	High risk
Blinding? All outcomes ‐ outcome assessor?	High risk
Incomplete outcome data addressed? All outcomes ‐ drop‐outs?	Low risk
Incomplete outcome data addressed? All outcomes ‐ ITT analysis?	Unclear risk	Unclear from text
Similarity of baseline characteristics?	High risk
Co‐interventions avoided or similar?	Unclear risk	Unclear from text
Compliance acceptable?	Unclear risk	No data available regarding compliance.
Timing outcome assessments similar?	Low risk