A Phase III Trial For Patients With Metastatic Breast Cancer

Time to disease progression (TTDP) at initial treatment was defined as the number of months between date of randomization and the date of first documented disease progression or the date of death due to disease under study, whichever came first. TTDP censored at earliest of: 1) date of death not due to disease; or 2) date of last contact for participants alive without disease progression; or 3) start date of other anti-tumor therapy; or 4) first dose date of crossover treatment.

For crossover treatment, time to disease progression (TTDP) was defined as the number of months between the first dose date of crossover treatment and the date of disease progression or the date of death due to disease under study, whichever came first. TTDP for crossover treatment only applied to those participants who crossed over from initial treatment to crossover treatment. TTDP censored at earliest of: 1)date of death not due to disease; or 2)date of last contact for participants alive without disease progression; or 3)start date of other anti-tumor therapy due to progression.

For initial treatment, progression-free survival (PFS) was defined as the number of months between the date of randomization and the date of first documented disease progression or the date of death due to any cause, whichever came first. Time to PFS was censored at the earliest of: 1) date of last contact for participants alive without disease progression; or 2) start date of other anti-tumor therapy for progression; or 3) first dose date of crossover treatment.

For crossover treatment, progression-free survival (PFS) was defined as the number of months between first dose date of crossover treatment and date of documented disease progression or date of death due to any cause, whichever came first. PFS for crossover treatment only applied to those participants who crossed over from initial treatment to crossover treatment. PFS was censored at the earliest of: 1) date of last contact for participants alive without disease progression; or 2) start date of other anti-tumor therapy for participants with documented disease progression.

Among tumor responders, duration of tumor response was measured from the date of response (complete response [CR] or partial response [PR] until the first date of documented progression or death from any cause. Duration of response was censored at the earliest of: 1) date of last contact for participants alive without disease progression (DP); or 2) start date of other anti-tumor therapy for DP; or 3) dose date of crossover treatment.

At crossover treatment, duration of response was measured from the time criteria were met for complete response (CR) or partial response (PR), until first date that recurrent or progressive disease was objectively documented or date of death due to any cause, whichever came first. This definition only applied to those who crossed over & achieved CR or PR in crossover treatment. Duration of response censored at earliest of: 1) date of last contact for those alive without disease progression; or 2) start date of other anti-tumor therapy for documented disease progression.

Overall survival time was defined as the number of months between the date of randomization and the date of death due to any cause. The overall survival time was censored at the date of last contact for participants who were still alive.

Best overall response was the best response recorded from the start of the treatment until disease progression/recurrence (taking as reference for progressive disease the smallest measurements recorded since the treatment started). Response was assessed using Response Evaluation Criteria In Solid Tumors (RECIST) criteria. Complete Response=disappearance of all target lesions; Partial Response=30% decrease in sum of longest diameter of target lesions; Progressive Disease=20% increase in sum of longest diameter of target lesions; Stable Disease=small changes that did not meet above criteria.

Best overall response was the best response recorded from the start of treatment until disease progression/recurrence (taking as reference for progressive disease the smallest measurements recorded since the treatment started). Response assessed using RECIST criteria. Complete Response=disappearance of all target lesions; Partial Response=30% decrease in sum of longest diameter of target lesions; Progressive Disease=20% increase in sum of longest diameter of target lesions; Stable Disease=small changes that did not meet above criteria.

KPS ranges from 0 to 100, subdivided into three categories: incapacitated (0-40), self-care (50-70), and normal activity (80-100).

KPS ranges from 0 to 100, subdivided into three categories: incapacitated (0-40), self-care (50-70), and normal activity (80-100).

RSCL includes 4 scales to assess quality of life (QOL) endpoints: 1) a 23-item physical distress level with scale score ranges from 23 to 92 [low score represents better QOL] 2)a 7-item psychological distress level with scale score ranges from 7 to 28[low score represents better QOL] 3)8-item activity level with scale score ranges from 8 to 32 [high score represents better QOL]; 1-item overall valuation of life with score range from 1 to 7 [low score represents better QOL].

RSCL includes 4 scales to assess quality of life (QOL) endpoints: 1) a 23-item physical distress level with scale score ranges from 23 to 92 [low score represents better QOL] 2)a 7-item psychological distress level with scale score ranges from 7 to 28[low score represents better QOL] 3)8-item activity level with scale score ranges from 8 to 32 [high score represents better QOL]; 1-item overall valuation of life with score range from 1 to 7 [low score represents better QOL].