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

Table 2 Cox regression models for long-term mortality following acute myocardial infarction by admission serum potassium concentration (n = 3347)

Admission SPC, mEq/l	Unadjusted Model		Minimal Model^a		Parsimonious Model^b
Admission SPC, mEq/l	HR (95% CI)	p Value	HR (95% CI)	p Value	HR (95% CI)	p Value
<3.5	0.98 (0.67–1.42)	0.9125	0.97 (0.68–1.44)	0.9420	0.92 (0.63–1.34)	0.6686
3.5 - <4.0	0.93 (0.74–1.15)	0.4871	0.88 (0.71–1.10)	0.2593	0.87 (0.70–1.09)	0.2297
4.0 - <4.5	1 (Ref.)		1 (Ref.)		1 (Ref.)
4.5 - <5.0	1.18 (0.91–1.53)	0.2176	1.15 (0.88–1.49)	0.3038	1.08 (0.83–1.41)	0.5582
≥5.0	2.49 (1.77–3.50)	<0.0001	2.31 (1.64–3.25)	<0.0001	1.46 (1.03–2.07)	0.0360

SPC, Serum potassium concentration; HR, Hazard Ratio; CI, Confidence Interval
^aAdjusted for sex and age
^bAdjusted for sex, age, angina pectoris, hypertension, hyperlipidemia, stroke, smoking status, peak creatine kinase - mycoardial band (CK-MB), any revascularization treatment (coronary artery bypass surgery, percutaneous coronary intervention (PCI) or thrombolysis), all four evidence-based medications (EBMs) 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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