Analysis of the incidence and influencing factors of hyponatremia before 131I treatment of differentiated thyroid carcinoma

Table 2 Factors associated with pre-¹³¹I therapy serum sodium level

	Correlation r	P value
Age (yr)	0.087	0.009
TSH (mIU/L)	0.045	0.174
Tg (ng/mL)	-0.028	0.402
Urinary iodine (µg/L)	0.013	0.697
Pre-operation serum sodium (mmol/L)	0.395	0.001
Blood urea nitrogen (mmol/L)	0.028	0.401
eGFR (mL/min m2)	-0.073	0.027