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Hospital Anxiety and Depression Scale (HADS). Higher scores denote a higher risk of anxiety or depression. <7: no anxiety or depression; 8–10: possible anxiety or depression; 11–21: high probability of anxiety or depression. No statistical differences between groups (p>0.05). CL/N/D, cardiac limitation or normal cardiopulmonary exercise testing or deconditioning; DB, dysfunctional breathing; RL, respiratory limitation group.
