Table 3:

All-Cause Mortality Stratified by Prolonged QT Interval

	n	Deaths	Median survival in years	Unadjusted HR (95% CI)	p-value	Adjusted HR (95% CI)*	p-value
Primary Definition
Not Prolonged	16,027	3,115	11.7
Prolonged	223	73	7.9	1.75 (1.39, 2.21)	<0.0001	1.61 (1.27, 2.03)	<0.0001
Optimal Cutpoint
QTc <448 ms	12,834	2,194	12.9
QTc ≥448 ms	3,416	994	7.6	1.90 (1.76, 2.05)	<0.0001	1.48 (1.37, 1.59)	<0.0001

^*Adjusted HR for age at index visit, sex and Charlson Comorbidity Index

HR, hazard ratio