Abstract

Benign prostatic hyperplasia (BPH) is commonly treated with 5-alpha-reductase inhibitor/alpha blocker combination therapy or with alpha blocker monotherapy. However, in China, the characteristics of BPH patients receiving 5-alpha-reductase inhibitor/alpha blocker combination therapy or alpha blocker monotherapy remain largely unknown. Therefore, this study compared the characteristics of BPH patients receiving either the 5-alpha-reductase inhibitor finasteride in combination with an alpha blocker or an alpha blocker as monotherapy in clinical practice in China. Data were obtained from a large electronic medical record database from four tertiary hospitals in major cities in China (2009-2016). BPH patients aged ≥ 50years with ≥ 1 alpha blocker fill on/after the first BPH diagnosis were selected. Patients were further classified as receiving combination therapy (≥ 1 overlapping day of supply for finasteride and an alpha blocker) or alpha blocker monotherapy (did not receive any 5-alpha-reductase inhibitor). Patient characteristics, visit type (in- vs. outpatient) at treatment initiation, and comorbidities were evaluated during the 6-month baseline period and compared between the two groups using two sample t tests and chi-square tests/Fisher's exact tests. A total of 2666 and 2738 patients received combination therapy and monotherapy, respectively. The combination group was older (70.3 vs. 67.3years, p < 0.0001) and had more patients initiated in an inpatient setting (46.0% vs. 26.4%, p < 0.0001). Compared with the monotherapy group, the combination group had more comorbidities, such as hypertension (48.3% vs. 35.6%, p < 0.0001), cardiovascular disease (65.3% vs. 48.0%, p < 0.0001), and diabetes (21.1% vs. 15.7%, p < 0.0001), and a higher Charlson comorbidity index (0.9 vs. 0.7, p < 0.0001). Chinese BPH patients using finasteride/alpha blocker combination therapy were older and had a higher comorbidity burden than those using alpha blocker monotherapy. These findings provide Chinese healthcare decision-makers with a better understanding of the patient characteristics generally associated with BPH combination therapy vs. alpha blocker monotherapy. Merck Sharp and Dohme (China) Co., Ltd., Shanghai, China.

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