Patient preferences and experiences regarding thrombopoietin-receptor agonists for immune thrombocytopenia in The Netherlands (TRAPeze Netherlands study)

A. J. Gerard Jansena, Vickie McDonald, Adrian Newland, Mervyn Morgan, Mieke Bastiaanse, Koo Wilson, Daniel Eriksson, Emma Geldman, Owen Daykin-Pont, Samantha Prince and Jaap Jan Zwaging



Identify patient experience and preference towards thrombopoietin-receptor agonists (TPO-RAs) in treatment of immune thrombocytopenia (ITP) in the Netherlands.


The Thrombopoietin-Receptor Agonist Patient experience (TRAPeze) survey used a discrete choice experiment (DCE) to elicit patient preferences and a patient burden survey (PBS) to evaluate the clinical and social impact of ITP. TRAPeze collected responses from 6th October to 19th November 2021.


Seventy-six respondents completed the DCE: treatment preference appeared to be driven by method of administration (odds ratio [OR] 4.33; 95% confidence interval [CI] 2.88– 6.52), frequency of dosing (OR 2.33; 95% CI 1.86–2.92) and drug–food interactions (OR 1.91; 95% CI 1.54–2.37). Respondents preferred therapies delivered orally over subcutaneous injection (OR 4.22; 95% CI 2.76–6.46), dosed once weekly over once daily (OR 2.37; 95% CI 1.58–3.54) and without food restrictions over with restrictions (OR 1.90; 95% CI 1.52–2.38). Sixty-nine respondents completed the DCE and PBS (mean [range] age 53 [19–83] years, 65% female). Seven incomplete PBS responses were excluded from analysis. Respondents were currently, or most recently, receiving eltrombopag (n = 43) or romiplostim (n = 26), of which 30% (n = 21/69) had previously received another TPO-RA. Loss (29%, n = 6/21) and lack (29%, n = 6/21) of response were the most common reasons for switching TPO-RA. Only 28% (n = 18/65) of respondents felt their TPO-RA increased energy levels.


Patients preferred therapies delivered orally, dosed less frequently and without food restrictions. QoL of ITP patients on TPO-RAs can be improved; the burden analyses presented can inform future efforts towards this.