Bello 2013.

Methods	Randomised controlled trial Method of randomisation: not described Blinding of outcome assessors: not described Adverse events: not described Deaths: not described Drop‐outs: not stated ITT: not stated
Participants	Country: Spain 22 patients (11 in treatment group, 11 in control group) Ambulatory at study onset: yes Mean age: 58 to 59 years (control and treatment group respectively) Inclusion criteria: being able to walk for 10 min without stopping, walking aids or assistance (on medication) Exclusion criteria: history of neurological conditions other than PD, orthopedic, or visual disturbances which affected walking ability and signs of cardiovascular or autonomic dysfunction
Interventions	2 arms: (1) control group used overground gait training, 3 times a week for 5 weeks (72 min a week) (2) experimental group received treadmill training without BWS, 3 times a week for 5 weeks (72 min a week)
Outcomes	Outcomes were recorded at baseline and at the end of intervention phase Unified Parkinson’s Disease Ranking Scale (UPDRS) Motor Score Measures of timed gait (walking speed, cadence, stride length) at preferred and at maximal speed Timed Up‐and‐Go test (TUG) Posturography Knee extensor muscle strength
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	method of sequence generation not described by the authors
Allocation concealment (selection bias)	Unclear risk	method not described by the authors
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	blinding not described by the authors
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	no missing outcome data described