Introduction: We investigated the health-related quality of life (HRQoL) of long-term prostate cancer patients who received leuprorelin acetate in microcapsules (LAM) for androgen-deprivation therapy (ADT). Methods: The observational study was carried out by 30 office-based German urologists in 536 prostate cancer (PCa) patients treated for ≥5 years with LAM and in 116 patients of an age-matched control group (CG). Data on HRQoL and health status was collected prospectively using validated questionnaires QLQ-C30, QLQ-PR25 and Karnofsky Index. Data on effectiveness (clinical response, prostate specific antigen [PSA], testosterone) and safety was collected retrospectively from patients’ health records. We used descriptive statistics to analyze the data. Results: The mean treatment duration was 8.6 years (range 4.5–19.8 years). General health status (QLQ-C30) was comparable for both groups. Differences were observed regarding physical – and role functioning. ADT patients rated single items slightly worse than CG. Karnofsky-Index showed comparable high values (median of 90%). QLQ-PR25 revealed more PCa-related symptoms for ADT patients. Within 6 months, median PSA level declined >90% and median testosterone levels declined below castration level from 4.0 to 0.2 ng/mL. Clinical response (European Organisation for Research and Treatment of Cancer criteria) was observed in at least 90% of ADT patients. Conclusions: Long-term ADT with LAM is a well-accepted, tolerated, effective, and low-burden treatment option for patients with advanced, hormone-sensitive PCa.

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