Olaparib Treatment in Relapsed Germline Breast Cancer Susceptibility Gene (BRCA) Mutated Ovarian Cancer Patients Who Have Progressed at Least 6 Months After Last Platinum Treatment and Have Received at Least 2 Prior Platinum Treatments

Progression Free Survival (PFS)

To determine the efficacy of single agent olaparib vs. physician's choice single agent chemotherapy by progression free survival (PFS) using BICR assessment according to RECIST 1.1 criteria PFS is defined as the time from randomization until the date of objective radiological disease progression according to RECIST 1.1 or death (by any cause in the absence of disease progression) regardless of whether the participant withdrew from randomized therapy or received another anti-cancer therapy prior to disease progression (i.e., date of RECIST progression/death or censoring - date of randomization +1).

Time frame: RECIST follow-up assessments performed every 8 weeks (±1 week), up to 48 weeks, then every 12 weeks (±1 week) from randomisation, assessed from date of first patient randomised to data cut off: 10Oct2018 (approx. 3 years 8 months)

Time From Randomisation to Second Progression (PFS2)

To determine the efficacy of single agent olaparib vs. physician's choice single agent chemotherapy by second progression (PFS2). Time from randomization to PFS2 is defined as the time from the date of randomization to the earliest of the progression events subsequent to first progression or death. The date of second progression was recorded by the investigator and defined according to local standard clinical practice, and could involve objective radiological, clinical, cancer antigen-125 (CA-125) progression or death. CA-125 progression was assessed per Gynecological Cancer Intergroup (GCIG) criteria.

Time frame: Visits to occur every 12 weeks from the date of first progression, assessed from date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)

Overall Survival (OS)

To determine the efficacy of single agent olaparib vs. physician's choice single agent chemotherapy by overall survival (OS). Overall survival is defined as the time from the date of randomisation until death due to any cause.

Time frame: Visits to occur every 12 weeks from the date of first progression, assessed from date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)

Time To Earliest Progression By RECIST 1.1 Or Cancer Antigen (CA) -125 Or Death

To determine the efficacy of single agent olaparib vs. physician's choice single agent chemotherapy by time to earliest progression by RECIST 1.1 or CA-125 or death. Response Evaluation Criteria In Solid Tumors (RECIST) 1.1 criteria was used to assess participant response to treatment. CA-125 progression was assessed per Gynecological Cancer Intergroup (GCIG).

Time frame: RECIST and CA-125 follow-up assessments performed every 8 weeks (±1week), up to 48 weeks, then every 12 weeks (±1week) from randomisation, assessed from date of first patient randomised to data cut off: 10Oct2018 (approx. 3 years 8 months)

Time From Randomization To First Subsequent Therapy Or Death (TFST)

To determine the efficacy of single agent olaparib vs. physician's choice single agent chemotherapy by time from randomisation to first subsequent therapy or death (TFST) TFST is defined as the time from the date of randomisation to the earlier of first subsequent chemotherapy start date or death. Anti-cancer treatments include chemotherapy and targeted agents.

Time frame: Anti-cancer treatments initiated post discontinuation of study treatment and investigator's opinion of response and date of progression recorded, assessed from date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)

Time From Randomization To Second Subsequent Therapy Or Death (TSST)

To determine the efficacy of single agent olaparib vs. physician's choice single agent chemotherapy by time from randomisation to second subsequent therapy or death (TSST) TSST was defined as the time from the date of randomisation to the earlier of second subsequent chemotherapy start date or death. Anti-cancer treatments include chemotherapy and targeted agents.

Time frame: Anti-cancer treatments initiated post discontinuation of study treatment and investigator's opinion of response and date of progression recorded, assessed from date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)

Time From Randomization To Study Treatment Discontinuation Or Death (TDT)

To determine the efficacy of single agent olaparib vs. physician's choice single agent chemotherapy by time to study treatment discontinuation or death (TDT) TDT was defined as the time from randomization to the earlier of the date of study treatment discontinuation or death.

Time frame: Patients randomised to Olaparib administer their tablets orally at a dose of 300 mg twice daily and continue Olaparib until objective disease progression. Assessed from date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)

Duration of Response (DoR)

To determine the efficacy of single agent olaparib vs. physician's choice single agent chemotherapy by duration of response (DoR) by BICR using RECIST 1.1 criteria for evaluable patients. Duration of response is the time from the first documentation of complete response (CR) or partial response (PR) until the date of progression or death, or the last evaluable RECIST assessment for participants that do not progress or progress after 2 missed assessments. Response Evaluation Criteria In Solid Tumors (RECIST) 1.1 criteria was used to assess participant response to treatment.

Time frame: RECIST follow-up assessments performed every 8 weeks (±1 week), up to 48 weeks, then every 12 weeks (±1 week) from randomisation, assessed from date of first patient randomised to data cut off: 10Oct2018 (approx. 3 years 8 months)

Time to Response (TTR)

To determine the efficacy of single agent olaparib vs. physician's choice single agent chemotherapy by time to response (TTR) by BICR using RECIST 1.1 criteria for evaluable patients. TTR was defined as the time from randomization until the date of first documented response by Blinded independent central review (BICR) assessment.

Time frame: RECIST follow-up assessments performed every 8 weeks (±1 week), up to 48 weeks, then every 12 weeks (±1 week) from randomisation, assessed from date of first patient randomised to data cut off: 10Oct2018 (approx. 3 years 8 months)

Mean Change From Baseline In Trial Outcome Index (TOI) Score

To compare the efficacy of single agent olaparib versus physician's choice single agent chemotherapy on the Health-related Quality of Life (HRQoL) as measured by the trial outcome index (TOI) of the Functional Assessment of Cancer Therapy - Ovarian (FACT-O) The TOI score was derived from the sum of the scores of the 25 items included in the physical well-being (7 items), functional well-being (7 items), and additional concerns ovarian cancer subscale (11 items) of the FACT-O questionnaire Version 4. TOI score ranges from 0 to 100, a higher score indicates a higher HRQoL. A negative change in score from baseline indicated a worsening in symptoms.

Time frame: Baseline (Day 1) to Week 48 (±1 week). DCO: 10Oct2018

Number of Participants Who Show an Improvement in TOI Score

To compare the efficacy of single agent olaparib versus physician's choice single agent chemotherapy on the Health-related Quality of Life (HRQoL) as measured by the trial outcome index (TOI) of the Functional Assessment of Cancer Therapy - Ovarian (FACT-O) The TOI score was derived from the sum of the scores of the 25 items included in the physical well-being (7 items), functional well-being (7 items), and additional concerns ovarian cancer subscale (11 items) of the FACT-O questionnaire Version 4. TOI score ranges from 0 to 100, a higher score indicates a higher health-related quality of life (HRQoL). A change in at least 10 points was considered clinically relevant.

Time frame: Baseline (Day 1) to Week 48 (±1 week). DCO: 10Oct2018

Objective Response Rate (ORR) in Breast Cancer Susceptibility (BRCA) Gene Population by Blinded Independent Central Review (BICR)

BRCA gene population includes participants identified as having a deleterious or suspected deleterious variant in either of the BRCA genes using variants identified with current and future BRCA mutation assays (eg, gene sequencing and large rearrangement analysis). The number of participants with complete or partial response per Response Evaluation Criteria In Solid Tumors (RECIST) 1.1 criteria. Partial response is declared when there is a decrease in sum of target disease ≥ 30%. Complete response is declared when all lesions have disappeared or all lesions have disappeared and all nodal disease is \< 10 mm each.

Time frame: RECIST follow-up assessments performed every 8 weeks (±1 week), up to 48 weeks, then every 12 weeks (±1 week) from randomisation, assessed from date of first patient randomised to data cut off: 10Oct2018 (approx. 3 years 8 months)

Number of Participants Who Experienced Disease Progression or Death in BRCA Gene Population by Blinded Independent Central Review (BICR)

BRCA gene population includes participants identified as having a deleterious or suspected deleterious variant in either of the BRCA genes using variants identified with current and future BRCA mutation assays (eg, gene sequencing and large rearrangement analysis). Progressive disease was defined as at least 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum of study. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm.

Time frame: RECIST follow-up assessments performed every 8 weeks (±1 week), up to 48 weeks, then every 12 weeks (±1 week) from randomisation, assessed from date of first patient randomised to data cut off: 10Oct2018 (approx. 3 years 8 months)

Number of Participants Who Experienced Second Progression or Death (PFS2) in BRCA Gene Population

BRCA gene population includes participants identified as having a deleterious or suspected deleterious variant in either of the BRCA genes using variants identified with current and future BRCA mutation assays (eg, gene sequencing and large rearrangement analysis).

Time frame: Visits to occur every 12 weeks from the date of first progression, assessed from date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)

Overall Survival (OS) in BRCA Gene Population

BRCA gene population includes participants identified as having a deleterious or suspected deleterious variant in either of the BRCA genes using variants identified with current and future BRCA mutation assays (eg, gene sequencing and large rearrangement analysis). OS in BRCA gene population was measured by the number of participants who died due to any cause.

Time frame: Visits to occur every 12 weeks from the date of first progression, assessed from date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)

Number of Participants Who Discontinued Study Treatment or Died in BRCA Gene Population

BRCA gene population includes participants identified as having a deleterious or suspected deleterious variant in either of the BRCA genes using variants identified with current and future BRCA mutation assays (eg, gene sequencing and large rearrangement analysis).

Time frame: Patients randomised to Olaparib administer their tablets orally at a dose of 300 mg twice daily and continue Olaparib until objective disease progression. Assessed from date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)

Number of Participants Who Received Subsequent Chemotherapy or Died in BRCA Gene Population

BRCA gene population includes participants identified as having a deleterious or suspected deleterious variant in either of the BRCA genes using variants identified with current and future BRCA mutation assays (eg, gene sequencing and large rearrangement analysis). Anti-cancer treatments include chemotherapy and targeted agents.

Time frame: Anti-cancer treatments initiated post discontinuation of study treatment and investigator's opinion of response and date of progression recorded, assessed from date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)

Number of Participants Who Received Second Subsequent Chemotherapy or Died in BRCA Gene Population

BRCA gene population includes participants identified as having a deleterious or suspected deleterious variant in either of the BRCA genes using variants identified with current and future BRCA mutation assays (eg, gene sequencing and large rearrangement analysis). Anti-cancer treatments include chemotherapy and targeted agents.

Time frame: Anti-cancer treatments initiated post discontinuation of study treatment and investigator's opinion of response and date of progression recorded, assessed from date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)

Geometric Mean Plasma Concentration of Olaparib

Summary of plasma concentrations (ug/mL) of olaparib

Time frame: Day 1, 1 hour post-dose and Day 29 pre-dose. DCO: 10Oct2018

Number of Participants Who Experience at Least One Adverse Event (AE)

An AE is the development of an undesirable medical condition or the deterioration of a pre-existing medical condition following or during exposure to a pharmaceutical product, whether or not considered causally related to the product.

Time frame: Safety Follow-up 30 days after last dose of IP, assessed from the date of first patient randomised to data cut off: 16Apr2021 (approx. 6 years 2 months)