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NDT Advance Access first published online on March 15, 2005
This version published online on April 6, 2005

Nephrology Dialysis Transplantation, doi:10.1093/ndt/gfh761
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© The Author [2005]. Published by Oxford University Press on behalf of ERA-EDTA. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org
Received June 23, 2003
Accepted December 17, 2004


Original Articles

The efficacy and safety of once-weekly and once-fortnightly subcutaneous epoetin {beta} in peritoneal dialysis patients with chronic renal anaemia

Wladyslaw Grzeszczak 1*, Wladyslaw Sulowicz 2, Boleslaw Rutkowski 3, Amedeo F. de Vecchi 4, Renzo Scanziani 5, Pierre-Yves Durand 6, Auxiliadora Bajo 7, Vassilis Vargemezis 8, and on behalf of the European Collaborative Group

1 Silesian Medical University School, Nephrology Clinic, Zabrze, Poland
2 Collegium Medicum, Jagiellonian University, Department of Nephrology, Krakow, Poland
3 Medical University School, Nephrology Clinic, Gdansk, Poland
4 Maggiore Hospital, Nephrology Division, Milan, Italy
5 Desio Hospital, Division of Nephrology and Dialysis, Desio, Italy
6 Association Altir, CHU Brabois, Vandoeuvre-de-Nancy, France
7 Hospital de la Paz, Nephrology Service, Madrid, Spain
8 University Hospital of Alexandroupolis, Nephrology Department, Alexandroupolis, Greece

* To whom correspondence should be addressed.
Wladyslaw Grzeszczak, E-mail: wgrzeszczak{at}slam.katowice.pl



  Abstract

Background. Reducing the dosage frequency of subcutaneous epoetin in peritoneal dialysis (PD) patients is convenient and should improve patient satisfaction and, possibly, compliance. We investigated if a weekly dosage of epoetin {beta} in PD patients safely maintained haemoglobin (Hb) concentrations equivalent to those obtained with previous twice- or thrice-weekly administration. In addition, we investigated if a fortnightly dosage of epoetin {beta} was safe and as effective as previous weekly administration.

Methods. After a 4 week run-in period, PD patients were switched to either weekly or fortnightly epoetin {beta} administration, depending on their previous treatment schedules, for 25 weeks.

Results. The per-protocol cohort included 128 patients, of whom 54 received epoetin {beta} once weekly and 74 once fortnightly. The mean change in Hb concentration from baseline over weeks 13-25 and the 90% confidence intervals (CIs) remained within the target range (10-12 g/dl) and specified equivalence (±0.75 g/dl) limits in the weekly (-0.34 g/dl; 90% CI: -0.14 to -0.54 g/dl) and fortnightly (-0.39 g/dl; 90% CI: -0.24 to -0.55 g/dl) cohorts. The mean change from baseline in the epoetin {beta} dose was 1.4 IU/kg/week (90% CI: -3.8 to 6.6 IU/kg/week; 2%) in the weekly cohort and 4.4 IU/kg/week (90% CI: 1.7-7.2 IU/kg/week; 13%) in the fortnightly cohort. Both treatment regimens were well tolerated.

Conclusions. In stable PD patients switched from twice- or thrice-weekly to weekly epoetin {beta} treatment, Hb concentrations could be maintained within the specified range over 25 weeks without significant change in their mean epoetin {beta} doses. In patients switched from weekly to fortnightly treatment, Hb concentrations could also be maintained over 25 weeks. There was a small increase in the mean dose during this period, but ≥50% of patients could be maintained without dose increase. Reducing dosage frequency may improve compliance in PD patients who self-administer their epoetin.

Keywords: dosage; epoetin beta; peritoneal dialysis; renal anaemia; subcutaneous.
The publisher would like to apologise, as not all corrections were made before publication.
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