Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

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.

View full-text article in PMC

. 2020 Sep 23;3(3):e1125. doi: 10.1002/jsp2.1125

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2020 The Authors. JOR Spine published by Wiley Periodicals LLC on behalf of Orthopaedic Research Society.

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

PMC Copyright notice

Histograms and cumulative density functions (CDFs) were used to compare distributions of D‐spacing based on region and grade of degeneration. The average values were not different from one another (61.1 ± 2.9, 62.6 ± 2.3, and 63.3 ± 1.9 nm for AF nondegenerate, AF degenerate, and NP degenerate, respectively). Distributions were compared using CDFs and Kolmogorov–Smirnov (KS) test statistics. The AF nondegenerate distribution was different from both of the degenerate distributions with statistical significance (P < .05). The AF and NP degenerate distributions were not different from one another (P > .05). AF, annulus fibrosis; NP, nucleus pulposus