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Fig. 3 | Respiratory Research

Fig. 3

From: Characterizing undiagnosed chronic obstructive pulmonary disease: a systematic review and meta-analysis

Fig. 3

Mean difference (MD) in age, pack-years of smoking, mMRC dyspnea score, and percent of predicted FEV1 between diagnosed and undiagnosed categories. Persistent airflow limitation was defined as post-bronchodilator FEV1/FVC < 0.7. Squares represent individual study estimates with the size of the square corresponding to their weight in the pooled estimate (represented with diamonds). * modified Medical Research Council (mMRC) Dyspnea scale [26] means and standard errors (SE) for the diagnosed and undiagnosed categories are multiplied by a factor of 10

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