“…Despite these high prevalence rates, few studies have examined how anxiety affects the progression of heart failure (Clarke et al, 2000;Cully et al, 2009;Friedmann et al, 2006;Tsuchihashi-Makaya et al, 2009). The available studies have described an association between higher anxiety and more limitations in activities of daily living (Clarke et al, 2000), poorer physical quality of life (Volz et al, 2011), greater impairment in functional status (Friedmann et al, 2006), higher medical service use (Cully et al, 2009), and more re-hospitalizations (Tsuchihashi-Makaya et al, 2009;Volz et al, 2011) in patients with chronic heart failure. In contrast, a few studies did not find an association between anxiety and hospitalizations (Konstam et al, 1996) or mortality in heart failure patients (Konstam et al, 1996;Jiang et al, 2004;Friedmann et al, 2006).…”