Time (days)	No. Risk	No. Event	Survival	Std. Error	Lower 95% CI	Upper 95% CI
1	464	27	0.942	0.0109	0.921	0.963
2	437	40	0.856	0.0163	0.824	0.888
3	397	43	0.763	0.0197	0.725	0.803
4	354	30	0.698	0.0213	0.658	0.741
5	324	21	0.653	0.0221	0.611	0.698
6	303	19	0.612	0.0226	0.569	0.658
7	284	59	0.485	0.0232	0.442	0.533
10	214	20	0.442	0.0231	0.399	0.489
15	175	31	0.375	0.0225	0.333	0.422
20	167	5	0.364	0.0223	0.323	0.411
25	125	42	0.272	0.0207	0.235	0.316
30	116	11	0.248	0.0201	0.212	0.291
35	86	29	0.185	0.0181	0.153	0.224
40	81	4	0.177	0.0178	0.145	0.215