Figure 5
From: Complement activation in astrocytomas: deposition of C4d and patient outcome
Box-plot of C4d positive tumor area fractions (C4d EXT) in grade I-IV astrocytomas. The C4d EXT groups: 1 = no positivity, 2 = 2% or less positive tissue, 3 = more than 2% positive tissue. (p = 0.041, Mann–Whitney U-test.).