['In a cross sectional study, 75 patients (42 males and 33 females) on continuous ambulatory peritoneal dialysis (CAPD) were enrolled from October 2007 to February 2008. Serum levels of leptin, albumin, triglyceride, dialysis adequacy (total KT/V), renal creatinine clearance (Cr Cl), mid arm circumference and demographic findings were measured in all patients.', 'The mean age of patients was 53±14.76. The history of hemodialysis was seen in 23 patients. Mean serum leptin level in women and men were 27±23µg/l and 16±13µg/l, respectively. A significant correlation of serum leptin level with body mass index (BMI) (p<0.001) and renal Cr Cl (p<0.001) was found. There was no significant correlation of serum leptin level with KT/V, duration of renal failure, serum triglycerides (TG), serum low density lipoprotein (LDL) cholesterol and mid arm circumference (p>0.05).'] Does serum leptin level have a positive correlation with BMI and creatinine clearance in CAPD patients?