Figure 2
From: Development of airflow limitation, dyspnoea, and both in the general population: the Nagahama study
Incidence of the development of AFL, dyspnoea and both among subjects who underwent follow-up assessment. Incidence rates of AFL, dyspnoea, and both (AFL with dyspnoea) at follow-up in groups with normal respiratory function and subclinical respiratory dysfunction at enrolment (N = 5086). A GOLD grade ≥ 2 was defined as the development AFL with %FEV1 < 80%. AFL airflow limitation, FEV1 forced expiratory volume in 1 s, FVC forced vital capacity. *Two subjects had both FEV1/FVC < LLN and %FEV1 < 80% at baseline. †P value < 0.05 compared with normal respiratory function.
