PTH and kidney disorder: Correlation analyses showed that cause of kidney disease (p = 0.03), kidney transplant status (p < 0.001), income (p = 0.02), serum calcium (p = 0.03), serum phosphate (p < 0.001), eGFR (p < 0.001), treatment center (p < 0.001), and furosemide use (p = 0.01) were potential determinants of PTH (Table3).