Unveiling the chasm of economic burden from metastatic prostate cancer through a nationwide retrospective cohort study.

Objective: To analyze the clinical and economic consequences of the progression to castration-resistant status for patients with metastatic hormone-sensitive prostate cancer (mHSPC) and metastatic castration-resistant prostate cancer (mCRPC) in South Korea.

Methods: This retrospective cohort study was conducted using National Health Insurance claims data from 2013 to 2021. Patients defined as newly diagnosed with mHSPC had an index date of first claim for metastatic PC between 2015 and 2016 and no exposure to CRPC medicines during the washout period.