Survival Curve

Figure 1. Survival curves by treatment with new drug and existing drug
Survival curves by customer category

The survival curves give a visual representation of the life tables. The horizontal axis shows the time to event. In this plot, drops in the survival curve occur whenever the medication takes effect in a patient. The vertical axis shows the probability of survival. Thus, any point on the survival curve shows the probability that a patient on a given treatment will not have experienced relief by that time. The plot for the New drug below that of the Existing drug throughout most of the trial, which suggests that the new drug may give faster relief than the old. To determine whether these differences are due to chance, look at the comparisons tables.

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