Review Article
Methods to Analyse Time-to-Event Data: The Kaplan-Meier Survival Curve
Table 1
Description of the procedure used to calculate the cumulative survival and construct the curve in Figure
1(b).
| Interval | Days | Patients at risk | CV deaths (0=no; 1=yes) | Censored | Survival probability | Cumulative survival |
| 1 | 0-80 | 10 | 1 | 0 | 0.900 | 0.900 | 2 | 81-120 | 9 | 1 | 1 | 0.890 | 0.801 | 3 | 121-180 | 7 | 1 | 1 | 0.857 | 0.687 | 4 | 180-230 | 5 | 1 | 1 | 0.800 | 0.549 | 5 | 231-250 | 3 | 1 | 0 | 0.667 | 0.366 | 6 | 251-365 | 2 | 0 | 2 | 1.000 | 0.366 |
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