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Proportion meta-analysis of overdiagnosis among subjects with clinical diagnosis of COPD, according to LLN definition [19,20,22,32,37,40,43,44,46,49]. ES = Effect Size (% of overdiagnosis); CI: Confidence Interval; COPD: Clinically Diagnosed Chronic Obstructive Pulmonary Disease; LLN: Lower limit of normal; I2: level of heterogeneity.
