Survival outcomes of elderly patients undergoing transcatheter aortic valve implantation after 3 years of follow-up

Table 4 Survival analysis

Interval start time in months	Number entering	Number withdrawing	Number exposed to risk	Number of terminal events	Proportion terminating	Proportion surviving	Cumulative proportion surviving
0	61	0	61	11	0.18	0.82	0.82
12	50	8	46	7	0.15	0.85	0.69
24	35	5	32.5	3	0.09	0.91	0.63
36	27	18	18	10	0.50	0.50	0.32