Abstract
The aim of our study was to determine whether leptin, a hormone implicated in both energy-balance and reproductive function, is involved in the etiology of prostate cancer or benign prostatic hyperplasia (BPH). We compared the serum leptin levels of 43 cases of incident prostate cancer, 41 patients with BPH, and 48 healthy controls, all recruited in Athens, Greece. Multiple logistic regression modeling was used, with adjustment for age, height, body mass index, education, estradiol, testosterone, dihydrotestosterone, dehydroepiandrosterone sulfate, sex hormone-binding globulin and insulin like growth factor 1. Odds ratios per 4 ng/ml increment of leptin were 0.70 [95% confidence interval (CI) (0.32,1.55)] for prostate cancer and 1.06 [95% CI (0.67,1.67)] for BPH. After adjustment for body mass index, serum leptin levels were not significantly correlated with levels of any of the other hormones under study. Leptin levels are unlikely to affect the risk of either prostate cancer or BPH substantially.
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