Fig. 1.

Kaplan-Meier “survival” plot after gentamicin treatment. The uppermost red curve indicates survival for all patients, where failure is defined as the need for destructive surgery. Each remaining curve indicates survival following a given round of gentamicin treatment, for the first through ninth rounds, where failure is instead defined as the need for a subsequent injection. Each separate Kaplan-Meier survival curve shows the percent survival of patients who received a given number of rounds of treatment versus the number of months that they survived following that treatment.