NCT02132949 · OUTCOME

Kaplan-Meier Estimate of the Percentage of Participants Event-Free for Event-Free Survival (EFS) at 1 to 5 Years, Determined by the Investigator According to RECIST v1.1

A Study Evaluating Pertuzumab (Perjeta) Combined With Trastuzumab (Herceptin) and Standard Anthracycline-based Chemotherapy in Participants With Human Epidermal Growth Factor Receptor 2 (HER2)-Positive Locally Advanced, Inflammatory, or Early-stage Breast Cancer · Source last updated 2021-09-17

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

Measure: NUMBER
Unit: Estimate of percentage of participants
Interval / dispersion: 95% Confidence Interval
Time frame: At 1, 2, 3, 4, and 5 years

What was measured

The Kaplan-Meier method was used to estimate the percentage of participants who were event-free at landmark timepoints. Event-free survival (EFS) was defined as the time from enrollment to the first occurrence of progressive disease (PD), relapse, or death from any cause, with tumor evaluations performed by the investigator according to RECIST v1.1. Ipsilateral or contralateral in situ disease and second primary non-breast cancers (including in situ carcinomas and non-melanoma skin cancers) were not counted as progressive disease or relapse. Participants who withdrew from the study without documented progression or relapse and for whom there existed evidence that evaluations had been made, were censored at the date of the last assessment at which the participant was known to be free from progressive disease or relapse. Participants with no tumor evaluations after baseline were censored at the date of enrollment plus 1 day.

Analysis population: ITT population: included all participants who were enrolled regardless of whether they received any study treatment, grouped according to the arm to which a participant was enrolled. The number analyzed per timepoint represents the number of participants remaining at risk at that timepoint.

Groups in this outcome

Cohort A: ddAC, Paclitaxel, Pertuzumab, Trastuzumab

Participants received neoadjuvant treatment with dose-dense doxorubicin and cyclophosphamide (ddAC), with administration of doxorubicin 60 milligrams per square meter (mg/m\^2) intravenously (IV) once every 2 weeks (q2w) and cyclophosphamide 600mg/m\^2 IV q2w for 4 cycles, followed by paclitaxel 80mg/m\^2 IV once weekly (qw) for 12 weeks. Pertuzumab (840 milligrams \[mg\] IV loading dose then 420mg IV q3w) and trastuzumab (8 milligrams per kilogram \[mg/kg\] IV loading dose then 4mg/kg IV q3w) were administered along with paclitaxel for 4 cycles (8 cycles of chemotherapy in total prior to surgery). Following surgery, participants received adjuvant treatment with pertuzumab and trastuzumab IV q3w (up to 13 cycles), for a total of 17 cycles of pertuzumab and trastuzumab therapy during the study. Radiotherapy and adjuvant hormonal therapy were also given as clinically indicated. Following treatment completion/discontinuation, participants were followed for safety and efficacy for up to 5 years.

Cohort B: FEC, Docetaxel, Pertuzumab, Trastuzumab

Participants received neoadjuvant treatment with 5-fluorouracil, epirubicin, and cyclophosphamide (FEC), with administration of 5-fluorouracil 500mg/m\^2 intravenously (IV) q3w, epirubicin 100mg/m\^2 IV q3w, and cyclophosphamide 600mg/m\^2 IV q3w for 4 cycles, followed by docetaxel (with starting dose of 75mg/m\^2 in Cycle 5, then 100mg/m\^2 for Cycles 6-8) q3w for 4 cycles. Pertuzumab (840 mg IV loading dose then 420mg IV q3w) and trastuzumab (8 mg/kg IV loading dose then 4mg/kg IV q3w) were given along with doectaxel for 4 cycles (8 cycles of chemotherapy in total prior to surgery). Following surgery, participants received adjuvant treatment with pertuzumab and trastuzumab IV q3w (up to 13 cycles), for a total of 17 cycles of pertuzumab and trastuzumab therapy during the study. Radiotherapy and adjuvant hormonal therapy were also given as clinically indicated. Following treatment completion/discontinuation, participants were followed for safety and efficacy for up to 5 years.

Group identifiers and denominators belong to this outcome only. They may differ in another outcome or in safety reporting.