Table 2. Univariate and multivariate analyses of risk factors associated with all-cause mortality and sudden cardiac death using a Cox proportional hazards model in 312 hemodialysis patients.

	All-cause mortality		Sudden cardiac death
	Unadjusted	Adjusted	Unadjusted	Adjusted
	HR (95% CI)	aHR (95% CI)	HR (95% CI)	aHR (95% CI)
Age	1.07 (1.05–1.09)*	1.05 (1.02–1.08)*	1.08 (1.05–1.12)*	1.07 (1.03–1.12)*
Female gender	0.83 (0.52–1.32)	1.38 (0.75–2.54)	0.93 (0.46–1.89)	0.93 (0.35–2.48)
Dialysis vintage	1 (0.99–1)	1 (1–1.006)	1 (0.99–1.01)	1.01 (1–1.02)
Body mass index	1 (0.93–1.08)	0.95 (0.87–1.03)	1.05 (0.95–1.17)	1.04 (0.9–1.2)
1.0 mEq/L K dialysate	0.17 (0.08–0.36)*	0.16 (0.07–0.37)*	0.41 (0.17–0.95)*	0.33 (0.13–0.85)*
2.5 mEq/L Ca dialysate	0.6 (0.19–1.9)	0.70 (0.21–2.3)	1.37 (0.42–4.55)	1.82 (0.5–6.6)
CAD	2.92 (1.51–5.67)*	1.89 (0.88–4.07)	2.9 (0.98–8.56)	1.7 (0.47–6.08)
DM	3.33 (2.09–5.31)*	2.09 (1.14–3.83)*	5.12 (2.47–10.6)*	4.68 (1.72–12.71)*
Kt/V	0.26 (0.08–0.85)*	0.05 (0.01–0.26)*	0.44 (0.08–2.56)	0.21 (0.01–4.4)
Serum albumin	0.07 (0.03–0.13)*	0.16 (0.06–0.4)*	0.08 (0.03–0.23)*	0.19 (0.04–1.01)
Hemoglobin	0.77 (0.62–0.97)*	0.79 (0.61–1.02)	0.99 (0.7–1.38)	0.97 (0.64–1.47)
Serum K concentration
Serum K < 4 mEq/L	3.82 (1.5–9.7)*	1.92 (0.67–5.5)	5.37 (1.22–23.65)*	2.82 (0.52–15.4)
Serum K 4–5 mEq/L	1.00 (Reference)	1.00 (Reference)	1.00 (Reference)	1.00 (Reference)
Serum K >5 mEq/L	0.67 (0.37–1.21)	2.1 (1.08–4.09)*	1.32 (0.62–2.85)	4.11 (1.62–10.41) *
Serum creatinine	0.69 (0.61–0.79)*	0.98 (0.78–1.22)	0.66 (0.54–0.81)*	0.93 (0.65–1.34)
Serum phosphate	0.64 (0.5–0.83)*	0.91 (0.64–1.29)	0.78 (0.53–1.16)	1.14 (0.67–1.94)
ALP	1 (1–1.002)	1 (1–1.006)	1 (1–1.004)	1 (1–1.008)

Abbreviations: HR, hazard ratio; aHR, adjusted hazard ratio; CI, confidence interval; K, potassium; Ca, calcium; CAD: Coronary artery disease; DM: Diabetes mellitus; ALP: Alkaline phosphatase.

*p value < 0.05.