Figure 2From: Can spirometric norms be set using pre- or post- bronchodilator test results in older people?Bland Altman plots for LLN values of FEV1, FEV6, FVC and FEV1/FVC (males – solid circles, females – hollow circles). The lines show the mean difference between pre- and post bronchodilator LLN values for males (solid line) and females (dotted line).Back to article page