Table 1.

Literature search strategy: PubMed, Scopus, Web of Science

Database	Search terms	Language	Results
PubMed	“COPD” AND “cost*” AND “economic impact”	English	35
PubMed	“COPD” AND “cost of illness” AND “burden of disease”	English	29
PubMed	“COPD” AND “burden of disease” AND “cost*”	English	12
Scopus	“COPD” AND “cost*” AND “economic impact”	English	20
Scopus	“COPD” AND “burden of disease” AND “cost*”	English	19
Scopus	“COPD” AND “cost of illness”	English	134
Web of Science	“COPD” AND “cost*” AND “economic impact”	English	44
Web of Science	“COPD” AND “burden of disease” AND “cost*”	English	13
Web of Science	“COPD” AND “cost of illness”	English	17

Source.Own elaboration