Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Cutoff values of fractal dimension (FD) for differentiation of pooled ISUP grade groups, determined as efficiency cutoffs as described under “Materials and methods”
| Pooled ISUP grade group comparison | FD cutoff |
|---|---|
| 1 versus 2–5 | 2.20 (p < .001) |
| 1–2 versus 3–5 | 2.31 (p < .001) |
| 1–3 versus 4–5 | 2.40 (p = .001) |
