On Cox multivariate analyses ghrelin (HR 1.02; 95% CI 1.01 – 1.03; p < 0.0001) and leptin (HR 0.94; 95% CI 0.92 – 0.96; p < 0.0001) were significant predictors of death even after correction for other known risk factors such as presence of metastasis and chronic kidney disease. Here, LEP is linked to chronic kidney disease.