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.
Distance between skin and gluteal muscle in normal and obese participants. Shaded boxes represent the interquartile range (Q1–Q3). Whiskers indicate minimum and maximum values. Median values are marked, and the difference is statistically significant (P < .001) using the Wilcoxon rank sum (Mann-Whitney U) test. Depth penetrated by a standard 1.5-in. needle is indicated with a dotted line.
