**5. Conclusions**

The findings of the study show that the interventions to increase QoL of patients with COPD has attracted increasing research interest in the last two decades. Non-pharmacological therapy and mental health problems were two common approaches. In addition, increasing support from HICs to LMICs in research together with the multidisciplinary collaboration of research areas are needed to improve the QoL of people living with COPD in LMICs.

**Author Contributions:** Conceptualization, G.V.V., G.H.H., H.Q.P., C.A.L. and R.C.M.H.; Data curation, G.H.H., C.T.N. and H.Q.P.; Formal analysis, G.H.H., C.T.N., G.T.V., H.Q.P. and B.X.T.; Investigation, G.V.V., B.X.T. and C.S.H.H.; Methodology, G.H.H., C.T.N. and B.X.T.; Project administration, G.T.V. and C.S.H.H.; Software, C.T.N.; Supervision, G.V.V., C.A.L. and B.X.T.; Validation, G.V.V., C.A.L., R.C.M.H. and C.S.H.H.; Writing—original draft, G.H.H., G.V.V.and H.Q.P.; Writing—review & editing, G.V.V., C.A.L. and R.C.M.H. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
