Fig. 2: 6-min walk distance at baseline, 3-months, and 6-months for intervention and control groups of the study by device type.
From: A randomized trial of a mobile health intervention to augment cardiac rehabilitation

The upper and lower bounds of the box refer to the 25th and 75th percentiles, and the line intersection in the box refers to the median. The dots outside of whiskers refer to outlying 6-min walk distances.