Assessment of comorbidities and prognosis in patients with COPD diagnosed with the fixed ratio and the lower limit of normal: a systematic review and meta-analysis

Abstract Background Currently, the diagnosis of chronic obstructive pulmonary disease (COPD) is not uniform, COPD guidelines recommend fixed ratio (FR), whereas ATS and ERS define airflow obstruction based on lower limit of normal (LLN). We aim to determine if there is difference between the two dia...

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Bibliographic Details
Main Authors: Huaiyu Xiong, Qiangru Huang, Tiankui Shuai, Lei Zhu, Chuchu Zhang, Meng Zhang, Yalei Wang, Jian Liu
Format: Article
Language:English
Published: BMC 2020-07-01
Series:Respiratory Research
Subjects:
Online Access:http://link.springer.com/article/10.1186/s12931-020-01450-9