Impact of Different Serum Potassium Levels on Postresuscitation Heart Function and Hemodynamics in Patients with Nontraumatic Out-of-Hospital Cardiac Arrest

Table 3

Multinomial logistic regression analysis for analyzing the strength of effects on heart function and hemodynamic status at different serum potassium levels.

	Serum potassium level
	Low (K^+ < 3.5)		Normal (K^+ = 3.5–5)		High^† (K^+ > 5)
	OR	95% CI	OR	95% CI	—
Heart rate
Tachycardia	3.54	1.32–9.51	2.85	1.56–5.23	1
Normal	2.68	1.05–6.82	2.97	1.74–5.08	1
Bradycardia^†	—	—	—	—	—
Blood pressure
Hypertension	0.47	0.19–1.12	1.05	0.62–1.76	1
Normal	1.01	0.45–2.28	1.33	0.79–2.26	1
Hypotension^†	—	—	—	—	—
Heart rhythm
Sinus rhythm	2.05	0.99–4.24	2.28	1.45–3.58	1
Nonsinus rhythm^†	—	—	—	—	—
Urine output (median)
>1 (ml/kg/hr)	5.35	2.58–11.1	1.17	0.75–1.85	1
<1 (ml/kg/hr)^†	—	—	—	—	—
Blood pH
Nonacidosis (>7.35)	7.74	3.78–15.85	2.67	1.57–4.53	1
Acidosis (<7.35)^†	—	—	—	—	—

^†Reference group; significant factors; OR: odds ratio; CI: confidence interval; the serum K⁺ level is given in units of mmol/L.