The Patient-reported, health economic and psychosocial outcomes in patients with Friedreich ataxia (PROFA): protocol of an observational study using momentary data assessments via mobile health app paper sees 200 patients enrolled in a six-month validation and observational study and will recruit from six centres across Germany, France, and Austria utilising the SARAhome assessment via our Atom5™ eCOA platform.


Friedreich ataxia (FA) is the most common hereditary ataxia in Europe, characterised by progressively worsening movement and speech impairments with a typical onset before the age of 25 years. The symptoms affect the patients’ health-related quality of life (HRQoL) and psychosocial health.

FA leads to an increasing need for care, associated with an economic burden. Little is known about the impact of FA on daily lives and HRQoL.

To fill that gap, we will assess patient-reported, psychosocial and economic outcomes using momentary data assessment via a mobile health application (app).

Methods and analysis 

The PROFA Study is a prospective observational study. Patients with FA (n=200) will be recruited at six European study centres (Germany, France and Austria). We will interview patients at baseline in the study centre and subsequently assess the patients’ health at home via mobile health app. Patients will self-report ataxia severity, HRQoL, speech and hearing disabilities, coping strategies and well-being, health services usage, adverse health events and productivity losses due to informal care on a daily to monthly basis on the app for 6 months. Our study aims to (1) validate measurements of HRQoL and psychosocial health, (2) assess the usability of the mobile health app, and (3) use descriptive and multivariate statistics to analyse patient-reported and economic outcomes and the interaction effects between these outcomes. Insights into the app’s usability could be used for future studies using momentary data assessments to measure outcomes of patients with FA.

Access the paper