Observational Study of Bevacizumab [Avastin] in Patients With Metastatic Colorectal Cancer (AVASTART)

Duration of bevacizumab treatment (in months) was defined as: (last treatment date - first treatment date plus [+] 1)/30.44. Duration of treatment was estimated using Kaplan-Meier method. Results are reported as per age groups (<70 years and greater than or equal to [≥] 70 years) as well as for overall participants.

PFS (in months) was defined as: (date of progression or censored date - first date of treatment + 1)/30.44. Date of progression was derived from Response Evaluation Criteria in Solid Tumors (RECIST) evaluation or from last available date for participant who withdrew the study for progressive disease without progression according to RECIST evaluation. Progression was defined (as per RECIST) as at least a 20 percent (%) increase in the sum of the longest diameter (LD) of target lesions, taking as reference the smallest sum LD recorded since the treatment started or the appearance of one or more new lesions or appearance of one or more new non-target lesions and/or unequivocal progression of existing non-target lesions. PFS was estimated using Kaplan-Meier method. Results are reported as per age groups (<70 years and ≥70 years) as well as for overall participants.

Tumor response was assessed using RECIST. Complete Response (CR): disappearance of all target and non-target lesions; Partial Response (PR): at least a 30% decrease in the sum of the LD of target lesions, taking as reference the baseline sum LD; Progressive Disease (PD): at least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum LD recorded since the treatment started or the appearance of one or more new lesions or appearance of one or more new non-target lesions and/or unequivocal progression of existing non-target lesions; Stable Disease (SD): neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD, taking as reference the smallest sum LD since the treatment started or persistence of one or more non-target lesion(s) or/and maintenance of tumor marker level above the normal limits. Results are reported as per age groups (<70 years, 70-80 years, and >80 years) as well as for overall participants.

ECOG performance status measured on a 6 point scale to assess participant's performance status. 0=Fully active, able to carry on all pre-disease activities without restriction; 1=Restricted in physically strenuous activity, ambulatory and able to carry out light or sedentary work; 2=Ambulatory (>50% of waking hours), capable of all self-care, unable to carry out any work activities; 3=Capable of only limited self-care, confined to bed/chair >50% of waking hours; 4=Completely disabled, cannot carry on any self-care, totally confined to bed/chair; 5=Dead. 0=Best status, 5=Worst status. For each time-point, only categories with available data are reported.