Table 3. Relationship between serum sodium and in-hospital mortality in different models of serum sodium quartiles.

		Q1(n = 114)	Q2(n = 103)	Q3(n = 102)	Q4(n = 96)
in-hospital mortality		8(7.0%)	12(11.7%)	19(18.6%)	22(22.9%)
in-hospital mortality(HR)	Crude model	ref	1.707(0.698–4.178), P = 0.241	2.890(1.264–6.604), P = 0.012	3.253(1.447–7.312), P = 0.004
	Model 1	ref	1.728(0.705–4.233), P = 0.232	2.825(1.228–6.502), P = 0.015	3.241(1.441–7.290), P = 0.004
	Model 2	ref	1.718(0.658–4.486), P = 0.269	3.086(1.242–7.671), P = 0.015	3.370(1.384–8.204), P = 0.007

Model 1: Adjusted for age, gender; Model 2: Adjusted for age, gender, Stanford type, hypertension, diabetes, CAD, smoking, drinking, serum glucose, α-HBDH.

For numerical raw data, please see S1 Data.