LEP and Parkinson disease: Such results support other studies which showed that serum level of leptin in patients with PD was not different from controls.11,20-23 Rocha, et al reported that adipokine levels in advanced PD patients were not different with age-gender-BMI-matched controls and had no association with clinical findings in patients with PD.        20  These finding were consistent with results of another study with limited sample size (eight PD patients and eight controls) that authors assessed adipokine levels in early PD patients.