CRP and congenital anomaly of kidney and urinary tract: In the multiple logistic regression analysis, after applying the Bonferroni correction, only C-reactive protein (C-RP) levels were significantly associated with hyponatremia (OR = 1.04; 95% CI: 1.02–1.06; p < 0.001), only age was significantly associated with hyperkalemia (OR = 1.7; 95% CI: 1.1–2.7; p = 0.01), and only CAKUT was significantly associated with concurrent hyponatremia and hyperkalemia (OR = 4.3; 95% CI: 1.7–10.8; p = 0.002).