KL and chronic kidney disease: The log-transformed value of the amount of 24 hr urinary excreted Klotho in the 97 CKD subjects without NS correlated with the eGFR (r = 0.506, p < 0.01), serum iPTH (r = −0.225, p = 0.0264), serum calcitriol (r = 0.424, p < 0.01), and age (r = −0.348, p < 0.01); while the log-transformed serum Klotho concentration correlated with the eGFR (r = 0.263, p < 0.01) and serum calcitriol (r = 0.337, p < 0.01).