A Study of Avastin (Bevacizumab) in Combination With Standard Chemotherapy in Children and Adolescents With Sarcoma.

EFS events included tumor progression (IRC assessed), no evidence of response after 3 cycles of induction (derived from IRC assessment), second primary cancer, or death due to any cause. Data for participants who had not experienced an event by the time of clinical cut-off were censored at the date of the last disease assessment prior to the clinical cut-off date. Data for participants who did not have any post-baseline disease assessments were censored at the time of randomization. Tumor progression was defined using Response Evaluation Criteria in Solid Tumors version 1.0 (RECIST v1.0) as at least a 20% increase in the disease measurement, taking as reference the smallest disease measurement recorded since the start of treatment, or the appearance of one or more new lesions, or evidence of clinical progression and unequivocal progression of existing non-target lesions.

EFS was defined as the time between randomization and occurrence of EFS event. EFS events are described in Outcome Measure 1. Median EFS was estimated using Kaplan-Meier estimates and 95% confidence intervals (CI) for median was computed using the method of Brookmeyer and Crowley.

Objective response prior to first local therapy (surgery and/or radiotherapy) was defined as complete response (CR) or partial response (PR) determined on two consecutive occasions >/=4 weeks apart. Tumor response was assessed as per IRC using RECIST v1.0. CR was defined as disappearance of all target and non-target lesions. If immunocytology was available, no disease was to be detected by that methodology. PR was defined as at least a 30% decrease in the disease measurement, taking as reference the disease measurement done to confirm measurable disease at study entry.

EFS events was described in Outcome Measure 1 and Outcome Measure 3.

Duration of Response was defined as time between first objective response and the occurrence of an EFS event (described in Outcome Measure 1). Objective response was defined in Outcome Measure 3. Median duration of response was estimated using Kaplan-Meier estimates and 95% CI for median was computed using the method of Brookmeyer and Crowley.

Overall survival was defined as the time between randomization and death due to any cause. Participants without an event were censored at the last time they were known to be alive. Median overall survival was estimated using Kaplan-Meier estimates and 95% CI for median was computed using the method of Brookmeyer and Crowley.

AUC is a measure of the serum concentration of the drug over time. It is used to characterize drug absorption. AUCss is expressed in milligrams times days per milliliter (mg*day/mL).

Volume of distribution is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Steady state volume of distribution (Vss) is the apparent volume of distribution at steady-state.

Half-life is the time measured for the plasma concentration to decrease by one half.

CL is a quantitative measure of the rate at which a drug substance is removed from the body. CL is expressed in milliliters per day (mL/day).