Figure 1From: Pulmonary function decline in firefighters and non-firefighters in South KoreaPercentage of forced expiratory volume in one second (FEV 1 ), forced vital capacity (FVC), and FEV 1 /FVC% for firefighters and non-firefighters in 2008 and 2011. Analysis was adjusted for age, height, body mass index, years of exposure, physical activity, and smoking.Back to article page