Appendix.

Treadmill Training for Patients with Parkinson Disease (PD): Cochrane Review Results¹⁴

^a Herbert R, Moseley A, Sherrington C. PEDro: a database of randomized controlled trials in physiotherapy. Health Infor Manag. 1998;28:186.

^b Hughes AJ, Daniel SE, Kilford L, Lees AJ. Accuracy of clinical diagnosis of idiopathic Parkinson's disease: a clinico-pathological study of 100 cases. J Neurol Neurosurg Psychiatry. 1992;55:181–184.

^c The standardized mean difference is the difference in mean outcome between groups divided by the standard deviation of the outcome.¹⁵ A standardized mean difference of 0.2 represents a small effect, 0.5 represents a moderate effect, and 0.8 represents a large effect.¹⁶