This non-interventional, observational, multicenter, prospective cohort study is designed to investigate the treatment patterns of mPC patients treated with lutetium (177Lu) vipivotide tetraxetan, as well as their clinical outcomes, real-world characteristics, and quality of life during the treatment period and up to one year after treatment completion.
The study population will be divided into two cohorts, enrolling patients with mCRPC and mHSPC, respectively. Patients planned to receive lutetium (177Lu) vipivotide tetraxetan treatment according to treating physician's assessment will be enrolled in the study upon signing an informed consent form. Patients must meet all inclusion criteria defined in the protocol and not meet any exclusion criteria. The patients' medical history, prostate cancer disease characteristics, demographics, and baseline data will be collected through medical records and examination reports. Treatment patterns, treatment outcomes, and HRQoL data will be collected during study follow-up visits through patient records, examination reports, and self-reported data. This study does not have a control group; instead, a self-control method will be used, with the patients' baseline data before the start of treatment serving as the control for efficacy, safety, and HRQoL assessments. The index date for this study is defined as the date of the first administration of lutetium (177Lu) vipivotide tetraxetan
Study Type
OBSERVATIONAL
Enrollment
170
prostate-specific antigen (PSA) 50 response rate
Defined as the proportion of patients with a confirmed decrease in PSA levels by ≥50% from baseline
Time frame: from 1 month before the index date through to 1 year after the end-of-treatment (EOT) visit
prostate-specific antigen (PSA) 90 response rate
Defined as the proportion of patients with confirmed decreases in PSA level by ≥90% from baseline
Time frame: from 1 month before the index date through to 1 year after the end-of-treatment (EOT) visit
Progression-Free Survival (PFS)
Defined as the time from the index date to the first occurrence of PSA progression or radiographic progression according to the Prostate Cancer Working Group 3 criteria, clinical progression assessed by the investigator, or death due to any cause (whichever occurs first)
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Radiographic progression-free survival (rPFS)
Defined as the time from the index date to the first occurrence of radiographic progression according to the PCWG3 criteria or death due to any cause (whichever occurs first)
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Clinical PFS
Defined as the time from the index date to the first occurrence of clinical progression assessed by the investigator or death due to any cause (whichever occurs first). Clinical progression is determined by the investigator and may be based on the following criteria: 1) Significant increase in tumor pain requiring initiation of another systemic anti-cancer treatment regimen; 2) The need to immediately start new anti-cancer treatment, surgery, or radiotherapy intervention due to complications caused by tumor progression, even in the absence of radiographic progression; 3) Deterioration of Eastern Cooperative Oncology Group (ECOG) performance status to ≥ 3, and the investigator determines that the deterioration indicates clinical progression
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Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Time to PSA progression
Defined as the time from the index date to the first occurrence of PSA progression or death due to any cause. According to the PCWG3 criteria, PSA progression is defined as follows: 1. For patients whose PSA has declined from baseline: PSA increased by ≥25% compared with the lowest value and the absolute value was ≥2 ng/mL, and was re-evaluated and confirmed after ≥3 weeks. 2. For patients whose PSA has not declined from baseline: After at least 12 weeks of treatment with the study drug, the PSA level increased by ≥25% from the baseline and the absolute value was ≥2 ng/mL
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Second Progression-Free Survival (PFS2)
Defined as the time from the initiation of the first subsequent systemic anti-tumor therapy following the end of treatment with lutetium (177Lu) vipivotide tetraxetan to the first occurrence of radiographic progression or PSA progression according to the PCWG3 criteria, clinical progression as assessed by the investigator, or death due to any cause (whichever occurs first)
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
OS
Defined as the time from the index date to death due to any cause
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Time to a first symptomatic skeletal event (SSE)
Defined as the time from the index date to the first occurrence of an SSE. SSEs include the use of external beam radiation therapy to prevent or palliate skeletal symptoms, the occurrence of a new symptomatic pathological fracture (vertebral or non-vertebral), the occurrence of spinal cord compression, or tumor-related orthopedic surgical intervention (whichever occurs first)
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Time to first subsequent therapy
Defined as the time from the index date to the start date of the first subsequent therapy for prostate cancer. Subsequent therapy refers to systemic anti-tumor treatment initiated after the patient discontinues lutetium (177Lu) vipivotide tetraxetan treatment
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Disease control rate (DCR)
Defined as the proportion of patients with complete response (CR) / partial response (PR), and stable disease (SD) as the best response in soft tissue lesion evaluation
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Objective response rate (ORR)
Defined as the proportion of patients with CR and PR as the best response in soft tissue lesion evaluation assessed referring to the evaluation criteria
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Time to response (TTR)
Defined as the time from the index date to the first documentation of CR or PR for soft tissue lesions referring to the evaluation criteria
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Duration of response (DoR)
Defined as the time from the first documentation of objective response (CR or PR) to the first occurrence of disease progression (radiographic, clinical, or PSA progression) or death due to any cause (whichever occurs first)
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Time to soft tissue progression (TTSTP)
Defined as the time from the index date to the occurrence of soft tissue progression referring to the evaluation criteria or death due to any cause (whichever occurs first)
Time frame: Data collection for radiographic assessment outcomes: from 3 months before the index date to 1 year after the EOT visit / Data collection for non-radiographic assessment outcomes: from 1 month before the index date to 1 year after the EOT visit
Number of participants by treatment dose and cycles of lutetium (177Lu) vipivotide tetraxetan
Number of participants by treatment dose and cycles of lutetium (177Lu) vipivotide tetraxetan
Time frame: Data collection of previous treatments for prostate cancer: from the time of prostate cancer diagnosis to the index date / Data collection of subsequent treatments for prostate cancer: from the index date to 1 year after the EOT visit
Number of participants by treatment sequences for prostate cancer
Prior treatment lines and subsequent treatments (including: ARPI, ADT, chemotherapy, radical prostatectomy, radiological treatment etc.)
Time frame: Data collection of previous treatments for prostate cancer: from the time of prostate cancer diagnosis to the index date / Data collection of subsequent treatments for prostate cancer: from the index date to 1 year after the EOT visit
Patient demographics and baseline characteristics
Time frame: From 1 month before the index date to the index date
Prostate cancer disease characteristics: Number of patients with Previous prostate cancer history
Time frame: Baseline
Prostate cancer disease characteristics: Gleason score
Typical Gleason Scores range from 6-10. The higher the Gleason Score, the more likely that the cancer will grow and spread quickly.
Time frame: From 1 month before the index date to the index date
Prostate cancer disease characteristics: Number of patients by metastasis status
Time frame: From 1 month before the index date to the index date
Prostate cancer disease characteristics: Number of patients by prostate cancer-related genetic mutation status
Time frame: From 1 month before the index date to the index date
Prostate cancer disease characteristics: Baseline prostate-specific antigen (PSA) level
Time frame: Baseline
Prostate cancer disease characteristics: prostate-specific antigen (PSA) doubling time
Time frame: From 1 month before the index date to the index date
Prostate cancer disease characteristics: Prostate-Specific Membrane Antigen (PSMA) diagnostic drug usage
Time frame: From 1 month before the index date to the index date
Prostate cancer disease characteristics: Baseline PET-CT results
Time frame: Baseline
Prostate cancer disease characteristics: Baseline testosterone level
Time frame: Baseline
Prostate cancer disease characteristics: Baseline Eastern Cooperative Oncology Group (ECOG) performance status
ECOG performance status is measured on a 6 point grade scale. 0: Fully active, able to carry on all pre-disease performance without restriction. 1. Restricted in physically strenuous activity but ambulatory and able to carry out work of a light or sedentary nature, e.g., light house work, office work. 2. Ambulatory and capable of all self-care but unable to carry out any work activities. Up and about more than 50% of waking hours. 3. Capable of only limited self-care, confined to bed or chair more than 50% of waking hours. 4. Completely disabled. Cannot carry on any self-care. Totally confined to bed or chair. 5. Dead.
Time frame: Baseline
Prostate cancer disease characteristics: Number of patients with family history of prostate cancer
Time frame: Baseline
Prostate cancer disease characteristics: Number of patients with carcinoembryonic Antigen (CEA)
Time frame: From 1 month before the index date to the index date
Adverse events
Time frame: From the index date to 1 year after the EOT visit
FACT-P score
The FACT-P was developed to measure the health-related quality of life (HRQOL) in patients diagnosed with prostate cancer. It extends the general FACT-G scale, which assesses cancer patients' overall quality of life, by adding specific items related to prostate cancer therapy. The FACT-P consists of two main sections: 1. FACT-G: A general section that covers four domains: Physical Well-Being (PWB)，Social/Family Well-Being (SWB)，Emotional Well-Being (EWB)，Functional Well-Being (FWB) 2. Prostate Cancer Specific Section: Focuses on issues unique to prostate cancer patients, such as urinary symptoms, sexual health, and the side effects of treatment. The scoring system for the FACT-P uses a 5-point Likert scale (from 0 to 4，from good to bad). Scores are calculated across different domains and subscales, and the total score is calculated by summing the scores across all domains, providing a range of 0 to 156. A high FACT-P score indicates a worse outcome.
Time frame: From 1 month before the index date to 1 year after the EOT visit
BPI-SF score
Brief Pain Inventory-Short Form (BPI-SF). The Brief Pain Inventory (BPI) rapidly assesses the severity of pain and its impact on functioning. BPI assessment areas including severity of pain, impact of pain on daily function, location of pain, pain medications and amount of pain relief in the past 24 hours or the past week. No scoring algorithm, but "worst pain" or the arithmetic mean of the four severity items can be used as measures of pain severity; the arithmetic mean of the seven interference items can be used as a measure of pain interference.
Time frame: From 1 month before the index date to 1 year after the EOT visit
EQ-5D-5L questionnaire score
EuroQol 5-Dimension 5-Level (EQ-5D-5L). The 5-level EQ-5D version (EQ-5D-5L) descriptive system comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems. The patient is asked to indicate his/her health state by ticking the box next to the most appropriate statement in each of the five dimensions. This decision results in a 1-digit number that expresses the level selected for that dimension. The digits for the five dimensions can be combined into a 5-digit number that describes the patient's health state.
Time frame: From 1 month before the index date to 1 year after the EOT visit
FACT-RNT score
Functional Assessment of Cancer Therapy - Radionuclide Therapy (FACT-RNT). The FACT-RNT was designed for use and future adaptation with a broad variety of RNT agents with different molecular targeting mechanisms and radioisotopes. The FACT-RNT, a 15-item measure of symptoms/toxicities with higher total scores(range:0-60) indicating less symptom burden.
Time frame: From 1 month before the index date to 1 year after the EOT visit