Testosterone Therapy in Men After Radical Prostatectomy for Organ-Confined, Low-Intermediate Prostate Cancer.

Abstract

Testosterone therapy (TTh) in men with T deficiency who have undergone radical prostatectomy (RP) for prostate cancer remains controversial. We aimed to assess the impact of TTh on biochemical recurrence (BCR) rates after RP in men with low-intermediate organ-confined disease. This study included men who underwent an RP at our institution for organ-confined prostate cancer and had grade groups 1 to 3 on RP pathology. A Cox model was created for time to BCR with T use included as a time-dependent covariate, adjusted for age, pre-operative PSA, grade group at RP and the presence of comorbidities. A landmark analysis was used: patients were included in the analysis if their last PSA in the 18 weeks post-operatively was undetectable and they had not had BCR or been lost to follow-up by that point, and follow-up for BCR began at 18 weeks. BCR was defined as a PSA ≥ 0.1 ng/mL post-RP with a second confirmatory rise ≥ 0.1 ng/mL. The study population included 5199 men post-RP, with 198 patients receiving T at any point after RP and 5001 not receiving T. The median age was 59 (IQR 55, 65) and 61 (IQR 56, 66) years, respectively. Men in the T group tended to present with more vascular comorbidities. For those receiving T, clomiphene citrate was prescribed in 49% of men, 32% received transdermal T, and 19% intramuscular T. We found a non-significantly decreased risk of BCR associated with the use of T after RP (HR 0.84, 95% CI 0.48, 1.46; P = .5), and overall rates of BCR were low, with probability of BCR at 5 years less than 2% in both groups. TTh can be given to select men after RP. We found no evidence that administration of TTh after RP causes BCR.