FGF23 and familial dilated cardiomyopathy: In patients with DCM, FGF-23 levels did not correlate with age (r = − 0.03, p = 0.34) but did correlate with eGFR (r = − 0.29, p = 0.03), RVEDD (r = 0.27, p = 0.04), TAPSE (r = − 0.43, p < 0.001), TAPSE/PASP (− 0.35, p = 0.01), mPAP (r = 0.51, p = 0.003), and LVEF (r = − 0.31, p = 0.02).