Erectile dysfunction (ED) and benign prostatic hyperplasia (BPH) are highly prevalent among aging men. However, the rate of coexistence of these two conditions in China is still unclear, especially among men aged 45 to 60 years. Instruments such as the abbreviated five-item version of the International Index of Erectile Function (IIEF-5) and the International Prostate Symptom Score (IPSS) can be used to determine the presence of ED and the symptoms and severity of BPH, respectively. This study aimed to estimate the prevalence of ED in men with BPH and to assess its impact on the quality of life (QoL) of these patients.

Between October 2018 and March 2019 we enrolled 650 patients aged 45 to 65 years who were diagnosed with BPH by a urologist in nine first- and second-tier cities in China. Information on patients’ demographics, lifestyle, comorbidities, and medication use was collected through an electronic clinical outcome assessment tool. Patients with an IIEF-5 score of less than twenty-two were considered to have ED. The IPSS and the five-level EuroQol questionnaire (EQ-5D-5L) were used to assess BPH severity and overall health-related QoL.

We enrolled 650 patients with BPH. Of these, only the 607 men who reported sexual intercourse attempts (mean age of 56.6 years, standard deviation 5.5) were included in the analysis because it was assumed that the other patients did not have ED. Signs of ED were present in ninety-seven percent of patients (IIEF-5 score < 22), and eighty-four percent had at least mild to moderate impairment (IIEF score < 17). Up to nineteen percent reported having physician-diagnosed ED previously, and twenty-eight percent had used medication for ED in the past six months. Compared to men without ED, those with ED and BPH had higher IPSS scores (13.2 versus 6.7, p < 0.05) and lower EQ-5D-5L scores (0.90 versus 0.97, p < 0.05).

Although the prevalence of ED in men with BPH in China is high, it is still underdiagnosed and undertreated. Co-existing ED in patients with BPH is associated with more severe BPH symptoms and lower quality of life.