**6. Aging**

In the population over 80 or more years old, up to 50% of individuals may have a FEV1/FVC <70%. Although some analogies between COPD and elderly have already been highlighted, further studies are required. Hence tables with normal spirometric values for the elderly have just been available recently. Nevertheless, the presence of a FEV1/FVC <70% is clinical data that should not be neglected, because there has been a marker of reduced life expectancy, even in old age.
