Hemmati 2011.

Methods	Randomised controlled trial
Participants	24 women were included (12 experimental and 12 control). All participants were from a convenience sample of friends and family.
Interventions	Motor control exercise versus no treatment
Outcomes	Pain (NRS 0 to 10) Disability (Oswestry Disability Index (ODI))
Notes	Data were extracted by a Persian translator
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Adequate random sequence generation used
Allocation concealment (selection bias)	Unclear risk	Not mentioned
Blinding of participants and personnel (performance bias) All outcomes	High risk	No mention of any attempts to blind the participants
Blinding of personnel/care provider (performance bias) All outcomes	High risk	No mention of any attempts to blind the care provider
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No mention of any attempts to blind the assessor
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	There is no mention of loss to follow‐up or how many were included at the follow‐up
Intention‐to‐treat analysis	Unclear risk	No mention of intention‐to‐treat analysis
Selective reporting (reporting bias)	Low risk	No previous protocol or trial registration, but it was clear that the published report included all expected outcomes
Group similarity at baseline (selection bias)	Low risk	Patients did not differ in their baseline characteristics
Co‐interventions (performance bias)	Unclear risk	Not mentioned
Compliance (performance bias)	Unclear risk	Not mentioned
Timing of outcome assessment (detection bias)	Unclear risk	Not mentioned