The boxes represent the 25and 75percentiles

The median is denoted as the line that bisects the boxes. The whiskers are lines extending from each end of the box covering the extent of the data on 1.5 × interquartile range. Circles represent the outlier values. P-values from Mann-Whitney U-test are shown, applied to test the statistical difference in the distributions of SBP or GFR estimates between two groups.

Copyright information:

Taken from ", a positional candidate for blood pressure and renal regulation: resequencing, association and study"

http://www.biomedcentral.com/1471-2350/9/25

BMC Medical Genetics 2008;9():25-25.

Published online 10 Apr 2008

PMCID:PMC2330028.