Disease burden of COPD in the Chinese population: a systematic review.

"The authors declare that there is no conflict of interest."

"Funding: The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The study was supported by the National Key Research and Development Program of China (NO.2023YFC3502601), the National Natural Science Foundation of China (No.81830116), the Innovation Team and Talents Cultivation Program of National Administration of Traditional Chinese Medicine (No: ZYYCXTD-C-202206), the Henan science and technology research project (NO. 212102311128), the Henan Province Outstanding Youth Science Fund Project (NO.212300410056), and the Henan Province Medical Science and Technology Tackling Program (NO.LHGJ20220586)."

"The method of this review strictly followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. The systematic review protocol was registered in the PROSPERO (International prospective register of systematic overview) database (No. CRD42023393429). Registration:: The systematic review protocol was prospectively registered with PROSPERO (No. CRD42023393429)."