Figure 4

Relationship between smoking status and baseline levels of HSA. Human lung tissue from current smokers (n = 18), ex smokers (n = 15) and non-smokers (n = 5) was homogenised and adjusted for total protein. HSA levels were measured in lung homogenates using ELISA. The median is marked as a solid bar and expressed as μg/ml. Data was analysed using the non-parametric Kruskal Wallis test, P < 0.05 was considered to be statistically significant.