The Association Between Low Preoperative Serum Testosterone and Post-radical Prostatectomy Urinary Function

Abstract

To determine if hypogonadism leads to delayed urinary function recovery post-radical prostatectomy (RP) by studying the effect of preoperative factors including age, membranous urethral length, radiation therapy, and Body Mass Index on urinary continence in patients with or without hypogonadism. We identified 1209 patients treated by RP with both pretreatment T and post-treatment urinary outcome. We assessed whether there was an association between low preoperative T level (prenoon T≤300ng/dL) and continence (using ≤1 pad/d) at 6 and 12months post-RP. Patient-reported continence was used when available, otherwise, surgeon-assessed continence was used. Logistic regression models were used, adjusted for age at RP and nerve-sparing status. Median age at RP was 61 (Intraquatile Range (IQR) 56, 66), 92% of patients had at least one nerve spared and 99% were continent at baseline. Continence in patients with low T was nonsignificantly lower at 6months (odds ratio 0.69, 95% confidence interval 0.44, 1.06; P=.10) and nonsignificantly higher at 12months (odds ratio 1.07, 95% confidence interval 0.71, 1.58; P=.8). Sensitivity analyses excluding patients with preoperative metastasis or treated with androgen deprivation therapy (ADT) and including testosterone as a continuous predictor were consistent with the primary analysis; similarly finding no evidence of an association. Although we cannot rule out an effect on early continence, overall the evidence does not suggest that low serum testosterone adversely impacts urinary function recovery after RP. This finding can be used to counsel patients enrolled in neoadjuvant ADT trials or those patients undergoing RP who have had prior ADT, such as in the setting of oligometastatic disease.