Figure 2. Pre- and Post-bronchodilator FEV1 over 5 Years (% Predicted).
Percent predicted pre- and post-bronchodilator FEV1 values (mean ± SEM) for subjects completing follow-up during each year. The percent predicted pre-bronchodilator FEV1 values remained unchanged over the 5 years after BT and bronchodilator responsiveness was maintained over the 5 years after BT.