This study is observational, and all data analyses will be descriptive in nature as there are no prespecified hypotheses. The primary analysis is the number and proportion of patients with any given number of lutetium (177Lu) vipivotide tetraxetan cycles (e.g., 1 cycle, two cycles, ... 6 cycles), described using counts and percentages.
Secondary analyses will be as follows:
• Patient profile (demographic and clinical characteristics), which will be reported as the number of non-missing observations, mean, SD, median, minimum, maximum, and IQR for continuous variables and counts and percentages for categorical variables.
• Survival outcomes (rwOS, median rwOS, five-year rwOS, rwPFS, median rwPFS, five-year rwPFS) will be assessed using time-to-event Kaplan-Meier methodology and will be reported as descriptive statistics (e.g., median time to event, IQR) with 95% CIs. Hazard ratio from Cox proportional hazards regression will be presented with 95% CIs. A p-value of less than 0.05 will be considered significant.
• Treatment response-related outcomes based on PSA level cutoffs will be reported as counts and percentages. Time to treatment response will be assessed using Kaplan-Meier methodology. Best overall response, overall response rate (complete response + partial response) and duration of response will be described.
• AESIs will be reported as counts and percentages.
• Changes in drug utilisation and treatment patterns will be described by reporting the number of non-missing observations, mean, SD, median, minimum, maximum, and IQR for continuous variables, and counts and percentages for categorical variables. TTNT,TTI, persistence and time to first change in dose or frequency of lutetium (177Lu) vipivotide tetraxetan outcomes will be analysed using Kaplan-Meier methodology and will be reported as descriptive statistics