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. Author manuscript; available in PMC: 2011 Jul 5.
Published in final edited form as: Pediatr Res. 2009 Sep;66(3):329–335. doi: 10.1203/PDR.0b013e3181b24e94

Figure 2.

Figure 2

Kaplan-Meier analyses of survival, survival free of invasive ventilation, and survival free of any ventilation. In each panel, thick solid lines show the Kaplan-Meier estimates for the treated patient group; thin solid lines show those for the historical control group, with 95% confidence intervals given by the corresponding dashed lines. Solid circles indicate right-censored observations. (A) Kaplan-Meier estimate of time from date of birth to death. Seven patients were right-censored from this analysis because they had not reached age 36 months by the end of the study, although they remained alive at that time. (B) Kaplan-Meier estimate of time from birth to invasive ventilator use or death. Four patients were right-censored from this analysis because they had not reached age 36 months by the end of the study, although they remained free of invasive ventilation that time. (C) Kaplan-Meier estimate of time from birth to any ventilator use or death. Four patients were right-censored from this analysis because they had not reached age 36 months by the end of the study, although they remained free of any ventilation that time. *Asterisk indicates that 1 patient from the historical control group remained alive at 36 months of age; this patient died at age 44 months.