Recent estimations of its prevalence report that about 13-20% of subjects with COPD have the overlap phenotype [ 6 , 7 ], with an increasing trend in the elderly population (up to 50% in those aged over 70 years) [ 7 ].
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Recent estimations of its prevalence report that about 13-20% of subjects with COPD have the overlap phenotype [ 6 , 7 ], with an increasing trend in the elderly population (up to 50% in those aged over 70 years) [ 7 ].