Percentage of asymptomatic people who do not smoke with no history of lung disease with FEV1/FVC below the GOLD1 threshold of 0.70 vs age (A) for men and (B) for women of average height (blue lines), 10 cm above average height (red lines), and 10 cm below average height (gray lines). The dotted red line at the lower 5th percentile is generally considered the lower limit of normal.

Fonte: https://journal.chestnet.org/action/showPdf?pii=S0012-3692%2823%2900942-X