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. 2013 Dec 18;8(12):e82225. doi: 10.1371/journal.pone.0082225

Table 4. Calculation of Probability of Survival According to the Risk Score.

Months 3 6 12 18 24
S0 (t) 90.0% 68.7% 43.9% 34.6% 20.9%

0 (t) gives the estimated survival probabilities for a patient with a risk score of 2.6 which is the mean risk score of the whole patients in this study. To calculate the probability of survival at t months of a given patient use the following equation: S(t) = S0(t)exp(score−2.6). S