Table 5. Comparison of overall mortality and stroke-related mortality for each age group.

Group (year)	HR	LCL	UCL	p value
Overall death
Younger than 70 years	Reference
70-79 years	1.802	1.227	2.647	0.003
Older than 80 years	3.771	1.694	8.394	0.001
Stroke-related death
Younger than 70 years	Reference
70-79 years	1.540	0.545	4.351	0.416
Older than 80 years	5.005	0.594	42.180	0.139

HR: hazard ratio, LCL: lower confidence limit, UCL: upper confidence limit.