Randomization
Patients were randomized in equal number to either continue the regular physiotherapy program to receive vibration therapy or suspension therapy in addition to the physiotherapy program offered by the faculty stuff. The randomization was stratified according to GMFCS level to ensure similar functional levels in both study groups. Following the baseline evaluation of each child, a closed envelope was randomly selected that contained the child‘s group allocation. The treatment allocation was disclosed to the child and the parents immediately after the baseline evaluation. Blinding of study participants and therapists is not possible with the WBV system or the suspension therapy used in this study, as the vibration or suspension produced by the device is easily observable.