A Phase III, Open Label, Randomized Study of Osimertinib versus Platinum-Based Doublet Chemotherapy for Patients with Locally Advanced or Metastatic Non-Small Cell Lung Cancer whose Disease has Progressed with Previous Epidermal Growth Factor Receptor Tyrosine Kinase Inhibitor Therapy and whose Tumours harbour a T790M mutation within the Epidermal Growth Factor Receptor Gene
This is a phase III, open label, randomized study assessing Osimertinib (80 mg, orally, once daily) versus platinum-based doublet chemotherapy (standard of care) in subjects with confirmed diagnosis of Epidermal Growth Factor Receptor (EGFR) mutation positive NSCLC, who have progressed following prior therapy with an approved Epidermal Growth Factor Receptor Tyrosine Kinase Inhibitor (EGFR-TKI) agent and whose tumours harbour a T790M mutation within the EGFR Gene. Subjects must be chemotherapy naive and must agree to provide a biopsy for central confirmation of T790 mutation status following confirmed disease progression on their first line EGFR-TKI treatment (e.g. erlotinib, gefitinib or afatinib). Suitable subjects will then be randomized to receive either Osimertinib (80mg orally, once daily) or platinum-based doublet chemotherapy (pemetrexed 500 mg/m2 + carboplatin area under the plasma concentration-time curve AUC 5 or pemetrexed 500 mg/m2 + cisplatin 75 mg/m2) on Day 1 of every 21-day cycle in a 2:1 (Osimertinib: platinum-based doublet chemotherapy) ratio. Once subjects on the platinum-based doublet chemotherapy arm are determined to have objective radiological progression according to RECIST 1.1 by the investigator and confirmed by independent central imaging review, they will be given the opportunity to begin treatment with Osimertinib 80mg, once daily. These subjects may continue treatment with Osimertinib even after disease progression, as long as they are continuing to show clinical benefit, as judged by the investigator. The primary objective of the study is to assess the efficacy of Osimertinib compared with platinum-based doublet chemotherapy by assessment of Progression Free Survival (PFS), using investigator assessments according to Response Evaluation Criteria in Solid Tumours (RECIST 1.1), as well as asensitivity analysis of Progression Free Survival using Blinded Independent Central Review (BICR).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
421
Randomization to either Osimertinib or platinum-based doublet-chemotherapy on Day 1 of every 21d cycle in a 2:1 (Osimertinib:platinum-based doublet-chemotherapy) ratio
Once subjects on the platinum-based doublet chemotherapy arm are determined to have objective radiological progression according to RECIST 1.1 by the investigator and confirmed by independent central imaging review, they will be given the opportunity to begin treatment with Osimertinib 80mg, once daily. These subjects may continue treatment with Osimertinib even after disease progression, as long as they are continuing to show clinical benefit, as judged by the investigator. Subjects who stop platinum-based doublet chemotherapy for reasons other than objective disease progression according to RECIST 1.1 will not be eligible to cross-over to Osimertinib.
Progression Free Survival (PFS) by Investigator Assessment
Per Response Evaluation Criteria in Solid Tumours (RECIST v1.1) assessed by MRI or CT: Progressive Disease (PD): \>= 20% increase in the sum of diameters of TLs and an absolute increase in sum of diameters of \>=5mm (compared to the previous minimum sum) or progression of NTLs or a new lesion. PFS is the time from date of randomisation until the date of PD (by investigator assessment) or death (by any cause in the absence of progression) regardless of whether the patient withdrew from randomised therapy or received another anti-cancer therapy prior to progression. Patients who had not progressed or died at the time of analysis were censored at the time of the latest date of assessment from their last evaluable RECIST 1.1 assessment.
Time frame: RECIST tumour assessments every 6 weeks from randomisation until objective disease progression up to 19 months (at the time of the primary PFS analysis).
Objective Response Rate (ORR) by Investigator Assessment
Per Response Evaluation Criteria in Solid Tumours (RECIST v1.1) assessed by MRI or CT: Complete Response (CR): Disappearance of all target and non-target lesions and no new lesions; Partial Response (PR): \>= 30% decrease in the sum of diameters of Target Lesions (compared to baseline) and no new lesions. ORR is the percentage of patients with at least 1 visit response of CR or PR prior to progression or any further therapy.
Time frame: RECIST tumour assessments every 6 weeks from randomisation until objective disease progression up to 19 months (at the time of the primary PFS analysis).
Duration of Response (DoR) by Investigator Assessment
Per Response Evaluation Criteria in Solid Tumours (RECIST v1.1) assessed by MRI or CT: Complete Response (CR): Disappearance of all target and non-target lesions and no new lesions; Partial Response (PR): \>= 30% decrease in the sum of diameters of Target Lesions (compared to baseline) and no new lesions. DoR is the time from the date of first documented response until the date of documented progression or death in the absence of disease progression.
Time frame: RECIST tumour assessments every 6 weeks from randomisation until objective disease progression up to 19 months (at the time of the primary PFS analysis).
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Research Site
Anaheim, California, United States
Research Site
Orange, California, United States
Research Site
Santa Rosa, California, United States
Research Site
Norwalk, Connecticut, United States
Research Site
Gainesville, Florida, United States
Research Site
Orlando, Florida, United States
Research Site
Pembroke Pines, Florida, United States
Research Site
Atlanta, Georgia, United States
Research Site
Park Ridge, Illinois, United States
Research Site
Indianapolis, Indiana, United States
...and 140 more locations
Disease Control Rate (DCR) by Investigator Assessment
Per Response Evaluation Criteria in Solid Tumours (RECIST v1.1) assessed by MRI or CT: Complete Response (CR): Disappearance of all target and non-target lesions and no new lesions; Partial Response (PR): \>= 30% decrease in the sum of diameters of Target Lesions (compared to baseline) and no new lesions; Stable disease (SD): Neither sufficient shrinkage to qualify as a response nor sufficient growth to qualify as progression; Progressive Disease (PD): \>= 20% increase in the sum of diameters of TLs and an absolute increase in sum of diameters of \>=5mm (compared to the previous minimum sum) or progression of NTLs or a new lesion. DCR is the percentage of patients with best response of CR, PR or SD at \>=6 weeks, prior to any progressive disease (PD).
Time frame: RECIST tumour assessments every 6 weeks from randomisation until objective disease progression up to 19 months (at the time of the primary PFS analysis).
Tumour Shrinkage by Investigator Assessment
Per Response Evaluation Criteria in Solid Tumours (RECIST v1.1) assessed by MRI or CT: Tumour size was calculated as the sum of the longest diameters (SLD) of the Target Lesions. Tumour shrinkage is percentage change in tumour size from baseline using RECIST v1.1 tumour response.
Time frame: RECIST tumour assessments every 6 weeks from randomisation until objective disease progression up to 19 months (at the time of the primary PFS analysis).
Secondary: Overall Survival (OS)
Time frame: From date of randomization until time of final OS analysis, a median follow-up of 43 months