text: prevalence of dyspnea in the adult general population 
  across 11 studies was estimated to be 10%. Dyspnea can 
  arise from a broad spectrum of underlying factors, 
  including both respiratory and nonrespiratory 
  conditions. Studies have revealed that dyspnea is not 
  solely attributable to respiratory conditions but is also 
  heavily inﬂuenced by cardiovascular deconditioning and 
  by nonrespiratory factors, including psychosocial, social, 
  and environmental determinants.5,6 