DEVELOPMENT OF A MODEL TO PREDICT DISEASE PROGRESSION IN AUTOSOMAL DOMINANT POLYCYSTIC KIDNEY DISEASE (ADPKD)

Author(s)

McEwan P1, Bennett Wilton H2, Robinson P3, Hadimeri H4, Ong A5, Ørskov B6, Peces R7, Sandford R8, Scolari F9, Walz G10, Woon C11, O'Reilly K3
1Swansea Centre for Health Economics, Swansea, UK, 2Health Economics and Outcomes Research Ltd, Cardiff, UK, 3Otsuka Pharmaceutical Europe Ltd, Wexham, UK, 4Department of Nephrology, Kärnsjukhuset, Skövde, Sweden, 5Academic Nephrology Unit, Department of Infection and Immunity, The University of Sheffield Medical School, UK, 6Department of Medicine, Renal Division, Copenhagen University Hospital, Roskilde, Denmark, 7Hospital Universitario La Paz, Madrid, Spain, 8Academic Laboratory of Medical Genetics, Addenbrooke’s Treatment Centre, Cambridge, UK, 9Department of Nephrology, University of Brescia, Italy, 10Department of Nephrology, University Medical Centre Freiburg, Zentrale Klinische Forschung, Freiburg, Germany, 11McCann Complete Medical, Macclesfield, UK

OBJECTIVES Autosomal dominant polycystic kidney disease (ADPKD) is a major cause of end-stage renal disease (ESRD) affecting approximately 4 per 10,000 people in Europe. There is a paucity of research regarding the natural history of ADPKD progression. This study aimed to utilise the results of a systematic literature review characterising predictors of ADPKD progression to construct a natural history disease model for ADPKD. METHODS An individual patient-level lifetime simulation was developed in Microsoft Excel, driven by baseline and time-dependent age, estimated glomerular filtration rate (eGFR) and total kidney volume (TKV). Rates of progression were informed by a large naturalistic study. Dialysis modality, transplant status and disease-specific mortality were also modelled. Relevant ADPKD complications were stratified by chronic kidney disease stages. Modification of disease progression rate was investigated in order to assess the potential of the model for evaluating treatment interventions.  RESULTS On visual inspection, modelled and published eGFR trajectories for the general ADPKD patient were consistent (median age at ESRD of approximately 55 years). When patients are stratified by baseline TKV the model predicts variable rates of progression to ESRD, aligning with the assertion that the baseline TKV is the most important prognostic indicator for ADPKD progression. Modification of the risk equations to incorporate the impact of an intervention has shown promise to estimate important outcomes such as delay to ESRD. CONCLUSIONS The model has demonstrated both face and predictive validity and is capable of predicting outcomes consistent with those reported in the ADPKD literature. It represents the first model capable of informing on important clinical outcomes relevant to both clinicians and patients, such as time to ESRD, with the potential to evaluate the long-term impact of treatment interventions on ADPKD progression.

Conference/Value in Health Info

2014-11, ISPOR Europe 2014, Amsterdam, The Netherlands

Value in Health, Vol. 17, No. 7 (November 2014)

Code

PRM118

Topic

Methodological & Statistical Research

Topic Subcategory

Modeling and simulation

Disease

Urinary/Kidney Disorders

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