Clinical Progression, Acute Urinary Retention, Prostate-Related Surgeries, and Costs in Patients with Benign Prostatic Hyperplasia Taking Early Versus Delayed Combination 5¦Á-Reductase Inhibitor Therapy and ¦Á-Blocker Therapy: A Retrospective Analysis

详细信息    查看全文

• 作者：Robert Morlock ; PhD¹ ; ^? ; ^{rmorlock@yourcarechoice.com} ; Bridgett Goodwin ; PhD² ; Gabriel Gomez Rey ; MS¹ ; Michael Eaddy ; PharmD¹ ; ^&dagger ;
• 关键词：alpha-blockers ; 5-alpha reductase inhibitors ; outcome assessment ; prostatic hyperplasia
• 刊名：Clinical Therapeutics
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：35
• 期：5
• 页码：624-633
• 全文大小：347 K

文摘

Background

Two previous retrospective database analyses compared early combination therapy with an ¦Á-blocker (AB) and 5-¦Á reductase inhibitor (5-ARI) to delayed combination therapy and found that patients receiving the delayed combination therapy were more likely to have clinical progression, acute urinary retention (AUR), and surgery. Although these studies indicate the clinical benefits of early treatment, both studies failed to take into account important baseline clinical measures, such as prostate-specific antigen (PSA) values.

Objective

This study was designed to compare clinical and cost differences in men with benign prostatic hyperplasia (BPH) who initiated early versus delayed combination therapy with a 5-ARI + an AB, factoring in baseline PSA values.

Methods

This retrospective claims data analysis assessed data from >14 million US men with linked medical data, pharmacy data, laboratory results, and enrollment information from January 1, 2000, to December 31, 2009. Men aged 50 or older and treated for BPH with a 5-ARI + an AB were identified. Patients were required to be eligible for services at least 6 months before and 12 months after the index medication date. Patients were assigned to 1 of 2 treatment groups based on therapy (early or delayed) and 3 cohorts based on availability of PSA laboratory values (patients with a PSA value, patients with a PSA value >1.5 and <10, and all patients). Using a logistic model, the likelihood of clinical progression (defined as the occurrence of AUR or prostate surgery) during the 12 months after the date of first prescription fill was compared between BPH patients receiving early versus delayed combination therapy. BPH-related medical costs (excluding pharmacy costs) were assessed using generalized linear models.

Results

Among the 13,551 patients identified for study inclusion, the highest risks for clinical progression, AUR, and prostate-related surgery were consistently demonstrated in patients with a PSA >1.5 and <10. Across all 3 cohorts, the delayed combination-treatment group was more likely to have clinical progression, AUR, and prostate-related surgeries versus the early combination-treatment group. The incremental difference in BPH-related costs between the delayed and early combination-treatment groups was $190 per patient overall; the greatest incremental difference ($397) was observed in patients with PSA >1.5 and <10.

Conclusions

The results suggest that early initiation of combination therapy with 5-ARI + an AB, compared with delayed initiation, can reduce the risks for clinical progression, AUR, and prostate-related surgeries, as well as BPH-related medical costs, in patients with BPH.