Fig. 2

Relationship between the knowledge of guidelines/recommendations on palliative care for non-malignant lung diseases and the routine use of a breathlessness score in clinical practice. Legend: Knowledge of guidelines was evaluated by a 5-point Likert scale: 1 - I know that no such guidelines/recommendations exist; 2 - I’m not sure if such guidelines/recommendations exist or not; 3 - Yes, I know of them but have not read them; 4 - Yes, I know of them but have only looked at them briefly; 5 - Yes, I know of them and have read them carefully. Kruskal-Wallis test was implemented to assess the difference in ordinal data among all independently sampled groups, with subsequent post-hoc test (Dunn’s test) for multiple comparison