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01.12.2015 | Research article | Ausgabe 1/2015 Open Access

BMC Urology 1/2015

Patient’s adherence on pharmacological therapy for benign prostatic hyperplasia (BPH)-associated lower urinary tract symptoms (LUTS) is different: is combination therapy better than monotherapy?

Zeitschrift:
BMC Urology > Ausgabe 1/2015
Autoren:
Luca Cindolo, Luisella Pirozzi, Petros Sountoulides, Caterina Fanizza, Marilena Romero, Pietro Castellan, Alessandro Antonelli, Claudio Simeone, Andrea Tubaro, Cosimo de Nunzio, Luigi Schips
Wichtige Hinweise

Competing interests

Cindolo does surgical tutorship for AMS and received honoraria from GSK for presentations. Tubaro is consultant and received research grant from Allergan and Astellas; he is investigator and paid speaker for AMS; he does presentations for Ferring, GSK and Pfizer; he is consultant for Bayer; he is consultant and investigator for GSK.
Pirozzi, Fanizza, Romero, De Nunzio, Castellan, Sountolides, Simeone, Antonelli, Schips declare declare that they have no competing interests.

Authors’ contributions

LC and MR worked on the study concept and design. MR collected the data. CF, LP, PC, CDN and LC analyzed and interpretated the data. LC, LP and PS drafted the manuscript. AA, CS, AT and LS contributed with critical revision of the manuscript for important intellectual content. CDN and CF performed statistical analysis. LC obtained funding. LP given administrative, technical, or material support. CS and LS have made supervision. All authors read and approved the final manuscript.

Authors’ information

Not applicable.

Availability of data and materials

Not applicable.

Abstract

Background

Recent studies showed that the non-adherence to the pharmacological therapy of patients affected by BPH-associated LUTS increased the risk of clinical progression of BPH. We examined the patients adherence to pharmacological therapy and its clinical consequences in men with BPH-associated LUTS looking at the differences between drug classes comparing mono vs combination therapy.

Methods

A retrospective, population-based cohort study, using prescription administrative database and hospital discharge codes from a total of 1.5 million Italian men. Patients ≥40 years, administered alpha-blockers (AB) and 5alpha-reductase inhibitors (5ARIs), alone or in combination (CT), for BPH-associated LUTS were analyzed. The 1–year and long term adherence together with the analyses of hospitalization rates for BPH and BPH-related surgery were examined using multivariable Cox proportional hazards regression model and Pearson chi square test.

Results

Patients exposed to at least 6 months of therapy had a 1-year overall adherence of 29 % (monotherapy AB 35 %, monotherapy 5ARI 18 %, CT 9 %). Patient adherence progressively declined to 15 %, 8 % and 3 % for AB, 5ARI, and CT, respectively at the fifth year of follow up. Patients on CT had a higher discontinuation rate along all the follow-up compared to those under monotherapy with ABs or 5ARIs (all p < 0.0001). Moreover, CT was associated with a reduced risk of hospitalization for BPH-related surgery (HR 0.94; p < 0.0001) compared to AB monotherapy.

Conclusions

Adherence to pharmacological therapy of BPH-associated LUTS is low and varies depending on drugs class. Patients under CT have a higher likelihood of discontinuing treatment for a number of reasons that should be better investigated. Our study suggests that new strategies aiming to increase patient’s adherence to the prescribed treatment are necessary in order to prevent BPH progression.
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