Figure 3.

Medulla was obtained when biopsy cores were longer, more numerous, and contained more glomeruli. Relationships between physical biopsy-core parameters and the probability of obtaining sample medulla. The likelihood of medulla was higher with greater number of cores from the procedure (A), with longer (and deeper) cores reflected by maximal core length (B; P<0.001), and with glomerular numbers (C; reflecting cortical adequacy and overall tissue mass; P<0.001). ***P<0.001 versus single core.