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. 2016 Feb 3;3:2. doi: 10.3389/fmed.2016.00002

Table 1.

Operational definitions related to cough and dyspnea provided to pharmacy and study participants on the case record forms.

–“Chronic” cough: “recurrent (multiple times per month) or regularly or continuously (almost daily for at least 8 weeks)”
–“Dyspnea”: “difficulty of deep inhalation, heavy breathing or rapid exhalation”
 o“Paroxysmal”: “only in specific situations [e.g., stress, sport, allergens (pollen, house dust, animal hair)]”
 o“Usual daily activity”: “e.g., when climbing stairs”