To evaluate possible discrepancies between patients’ expectations concerning sexual side effects related to prostate cancer treatment, based on the obtained information prior to treatment. Moreover, to determine if demographic or clinical factors may have an effect on the accuracy of patients’ expectations concerning sexual side effects after treatment.

A multicenter, cross-sectional survey was performed among men treated with prostatectomy, brachytherapy, external-beam radiotherapy and/or hormonal therapy.

In total, 412 questionnaires were analyzed. Of men with sexual side effects after treatment, 1 in 3 (32.5%, n = 109) reported their complaints as worse than expected; significantly more often reported by men treated surgically (P = .001), men with a local stage tumor (P = .005) and by men with a lower prostate-specific antigen level at diagnosis (P = .046). It was significantly less often reported by men treated with radiotherapy combined with hormonal therapy (P = .031). Men who used brochures as an information source reported their sexual side effects significantly less often as worse than expected (P < .001).

One in three men with sexual side effects after prostate cancer treatment, experienced their complaints as worse than expected based on the obtained information prior to treatment. Men treated with radiotherapy combined with hormonal therapy indicated less discrepancy between expectations and developed sexual side effects, whereas prostatectomy, low stage tumor and low prostate-specific antigen level were associated with more discrepancy. Brochures should be administered additionally to verbal information to improve patients’ understanding of possible sexual side effects and to enhance the accuracy of patients’ expectations.