FGF23 and glomerulosclerosis: Spearman's rho rank correlation analysis showed a significant (p<0.0001) positive correlation between the level of renal FGF23 expression and proteinuria (rho = 0.689), glomerulosclerosis (rho = 0.823), tubular damage (rho = 0.787) and interstitial ED1-positive monocytes/macrophages (rho = 0.730).