Dalichau 2000.

Methods	RCT
Participants	Subjects: 63 male with LBP, mean age 38.4 and 34 male without LBP. Inclusion criteria: LBP for more than 2 years and degenerative changes in lumbar region. No exclusion criteria.
Interventions	Treatment intervention: 1) training and lumbar support (n = 21) Use of lumbar support 8 weeks. Control intervention: 2) Training (n = 21) 3) No intervention (n = 21) 8 weeks.
Outcomes	Pain, back specific functional status, muscle flexibility, coordination flexion. Differences after 8 weeks and 6 months between training groups and control group. No differences between training plus lumbar support and training.
Notes	No data available regarding compliance. No statistical test of effect between groups for pain and functional status.
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?	Low risk
Similarity of baseline characteristics?	High risk
Co‐interventions avoided or similar?	High risk
Compliance acceptable?	High risk	No data available regarding compliance.
Timing outcome assessments similar?	Low risk