Fig. 4
From: Global lung function initiative 2012 reference values for spirometry in Asian Americans
Bland-Altman plots of spirometry predictions using NHANES III Caucasian values with a correction factor of 0.88 for FEV1 and FVC against those with GLI-2012 equations for individuals of mixed ethnic origin (difference = NHANES III prediction – GLI-2012 prediction). In this graph, dashed line represents the mean difference; dotted line represents 95% confidence interval of the mean difference; solid line represents the value of zero. NHANES III: The Third National Health and Nutrition Examination Survey; FEV 1 : forced expiratory volume in 1 s; FVC: forced vital capacity; GLI: Global Lung Function Initiative