Abstract
The major goal of randomized clinical trials is to determine the potential benefits and harms of an intervention. The benefits of most available interventions in medicine are symptom improvements. Thus, relief or reduction of symptoms is a common primary outcome in clinical trials (Chap. 3). Most of the adverse effects of interventions are also symptom-related (Chap. 12). Any changes in symptomatology are subjective and reported by trial participants. A special form of participant reported outcomes relate to various types of functioning, traditionally covered by the term health-related quality of life (HRQL) [1–4].
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Friedman, L.M. et al. (2015). Assessment of Health Related Quality of Life. In: Fundamentals of Clinical Trials. Springer, Cham. https://doi.org/10.1007/978-3-319-18539-2_13
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