Fig. 3

Plasma C4Ma3 (a), plasma TUM (b) and plasma fibrinogen (c) levels in survivors (n = 954) versus deceased (n = 30) COPD subjects. Data are shown as Tukey box-and-whiskers plot with a line indicating median, the box indicating the 25th and 75th percentiles (the interquartile range, IQR), and whiskers indicating 1.5 times the IQR. Data points outside this limit are shown by individual points. Asterisks indicate statistical significance: ***p < 0.001