“…The current results are in line with previous findings from qualitative studies which demonstrated that the unpredictability of dyspnea is particularly frightening for patients with cardiopulmonary diseases or cancer and amplifies their perception of dyspnea (Booth et al, 2018; Lovell et al, 2018; Linde et al, 2018). These findings also converge with previous notions that the perception of dyspnea is a subjective interpretation process of respiratory input that is strongly modulated by multiple factors (von Leupoldt and Dahme, 2007; Lansing et al, 2009; Janssens et al, 2011; Hayen et al, 2013; Herigstad et al, 2017; Spathis et al, 2017; Van den Bergh et al, 2017; von Leupoldt, 2017; Similowski, 2018). For example, one model describes that the perception of dyspnea consists of a sensory component (intensity) and an affective component (unpleasantness) (Wilson and Jones, 1991; Meek et al, 2003; von Leupoldt and Dahme, 2005; Lansing et al, 2009).…”