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. 2020 Mar 3;15:471–478. doi: 10.2147/COPD.S214410

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© 2020 Vaidya et al.

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Comprehensibility of the C-PPAC questionnaire expressed in Likert scores for the 12 questions. Radar chart representing every Likert category from 0 to 5, 0 being “not at all clear” to 5 being “absolutely clear” (the percentage of each Likert category is presented on the y-axis; Likert 0 and 1 were not visible due to the presence of < 5% of the patients).