tokens: Patients with dyskinesia had lower onset age ( p < 0 . 001 ) , longer duration of levodopa therapy ( p < 0 . 001 ) , longer disease duration ( p < 0 . 001 ) , higher total daily levodopa dose ( p < 0 . 001 ) , and higher total UPDRS scores ( p = 0 . 005 ) than patients without dyskinesia .