Table 5.

Comparison of mean baseline QTc and ∆QTc interval according to baseline serum potassium level.

	Serum K+ < 4.0 mmol/L N = 42	Serum K+ ≥ 4.0 mmol/L N = 67	P value
QTc and ∆QTc, ms, Mean ± SD
QTc by Bazett	451.46 ± 33.44	435.82 ± 25.50	0.007
∆QTc by Bazett	8.66 ± 37.03	7.26 ± 26.97	0.82
QTc by Fridericia	425.69 ± 30.64	410.23 ± 26.26	0.006
∆QTc by Fridericia	13.43 ± 39.07	11.41 ± 27.77	0.75
QTc by FHS	423.46 ± 28.28	409.91 ± 2.98	0.009
∆QTc by FHS	13.53 ± 37.85	10.91 ± 25.69	0.67

FHS- Framingham Heart Study.

Bold indicates significant value.*