Admission serum potassium concentration and long-term mortality in patients with acute myocardial infarction: results from the MONICA/KORA myocardial infarction registry

Table 3 Adjusted Cox regression models for observation periods of one, three, five and ten years (n = 3347)

	Admission SPC, mEq/l	Parsimonious model^a
	Admission SPC, mEq/l	HR (95% CI)	p Value
1-year observation period (>28 days to one year)	< 3.5	1.04 (0.43–2.55)	0.9269
	3.5 - <4–0	0.92 (0.51–1.67)	0.7924
	4.0 - <4.5	1 (Ref.)
	4.5 - <5.0	1.96 (1.10–3.48)	0.0230
	≥5.0	1.22 (0.49–3.04)	0.6638
3-year observation period (>28 days to 3 years)	<3.5	0.60 (0.31–1.16)	0.1268
	3.5 - <4–0	0.72 (0.50–1.04)	0.0780
	4.0 - <4.5	1 (Ref.)
	4.5 - <5.0	1.39 (0.96–2.00)	0.0799
	≥5.0	1.29 (0.75–2.21)	0.3560
5-year observation period (>28 days to 5 years)	<3.5	0.79 (0.49–1.29)	0.3423
	3.5 - <4–0	0.78 (0.58–1.04)	0.0901
	4.0 - <4.5	1 (Ref.)
	4.5 - <5.0	1.32 (0.97–1.80)	0.0811
	≥5.0	1.40 (0.91–2.14)	0.1232
10-year observation period (>28 days to 10 years)	<3.5	0.92 (0.63–1.34)	0.6527
	3.5 - <4–0	0.85 (0.68–1.06)	0.1463
	4.0 - <4.5	1 (Ref.)
	4.5 - <5.0	1.08 (0.83–1.41)	0.5650
	≥5.0	1.44 (1.02–2.05)	0.0218

SPC, Serum potassium concentration; HR, Hazard ratio; CI, Confidence interval
^aAdjusted for sex, age, angina pectoris, hypertension, hyperlipidemia, stroke, smoking status, peak creatine kinase -myocardial band (CK-MB), any revascularization treatment (coronary artery bypass surgery, percutaneous coronary intervention (PCI) or thrombolysis), all four medications at discharge (antiplatelet agents, beta-blockers, ACEIs/ARBs (Angiotensin-converting enzyme inhibitors/Angiotensin receptor blockers), statins), diuretics at discharge, calcium channel blockers at discharge, insulin at discharge

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