58795 127036 069541 052841 132512 039425 020260

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Unformatted text preview: 1.58795 1.27036 . 0.69541 0.52841 1.32512 0.39425 0.20260 0.53388 2.39836 1.38535 0.95277 1.55784 1.04860 0.68446 3.47981 1.85079 1.06229 Median survival in group A was 0.7 years (95% CI: 0.5–1.3 years), while in group B median survival was 1.4 years, twice as long (95% CI: 1.0–1.9 years). 3 3. Select a time and report percent in each group surviving at that time. Percent surviving (and confidence interval) beyond a particular time comes from ˆ theProc Lifetest listing of S (t ). Stratum 1: group = A years 0.00000 .... 0.86242 1.09788 Survival 1.0000 Failure 0 Survival Standard Error 0 0.4444 0.4222 0.5556 0.5778 0.0741 0.0736 Number Failed 0 Number Left 45 25 26 20 19 After one year of treatment, estimated proportion surviving in group A was 44% ± 7%, but in group B the estimated proportion surviving was 68% ± 7%. 4 Hazard function hazard function h (t ) = f (t ) chance of an event at time t = S (t ) percent alive at time t Hazard h(t) is time-specific event rate. Survivor function S (t ) = percent still at risk (alive) at time t ....
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