A Study to Assess Adherence to Apalutamide in Metastatic Hormone-Sensitive Prostate Cancer Participants in France

Inclusion criteria:

* Male (based on chromosomal composition at birth) and aged greater than or equal to (\>=) 18 years.
* Must have a histologically or cytologically confirmed diagnosis of prostate adenocarcinoma
* Must have documented metastatic hormone-sensitive prostate cancer (mHSPC)
* Must have agreed with the treating physician to initiate treatment with apalutamide (plus androgen-deprivation therapy \[ADT\]) in accordance with the current product characteristics summary, based on the physician's decision, prior to study inclusion
* Able to understand the content of the patient information sheet and has provided oral consent for data collection. Has received the information sheet and has not objected to data collection
* Must have a baseline prostate-specific antigen (PSA) level collected prior to the first administration of apalutamide.
* Must agree to complete adherence and quality-of-life questionnaires during the study, including before the first administration of apalutamide

Exclusion criteria:

* Has already received or is currently receiving apalutamide, or any other androgen receptor pathway inhibitor (ARPI; including but not limited to abiraterone acetate, darolutamide, and enzalutamide) or chemotherapy for mHSPC
* Has received an investigational drug (including vaccines) or used an invasive investigational medical device within 90 days prior to study start or data collection
* Is currently receiving active treatment for prostate cancer as part of an interventional study
* Has received ADT for mHSPC for more than 4 months prior to starting apalutamide treatment
* Has experienced progression under ADT (and thus became castration-resistant) before starting apalutamide treatment
* Beneficiary of State Medical Aid \[AME\]
* Does not speak/read French
* Under guardianship or curatorship
* Under judicial protection