Fig. 1

This box whisker plot shows the age of the 271 dogs in days on the vertical axis when they were examined by a veterinary cardiology specialist because of a cardiac murmur. The box represents the interquartile range and the line within the box represents the median age of the dogs at referral: 190 days (6.3 months). The x represents their mean age (1.5 years). Dogs with the youngest and oldest age at referral are shown with the whiskers and the outliers are displayed with circles