Box plot depicting the overall survey results. The length of the box represents the interquartile range (the distance between the 25th and 75th percentiles). The diamond in the box interior represents the mean score. The horizontal line in the box interior represents the median score. The vertical lines (whiskers) issuing from the box extend to the minimum and maximum value.
Prabhakar et al. BMC Surgery 2012 12:8 doi:10.1186/1471-2482-12-8