Box and whisker plot for EQ-5D index score. The EQ-5D index score is divided into adolescents with no pain, one region of pain, multi-site pain, and daily pain. The boxes are bordered at the 25th and 75th percentile (the interquartile range (IQR)) and the diamonds represent the median EQ-5D index scores. The whiskers display the boundary of 1.5 times the interquartile range above and below the median. Outliers beyond the whiskers are shown as individual circles.