Figure 2.

CART of women with menstruation by hie related symptoms and findings. The root node of Figure 2 indicates that there were 509 total observations (n = 509), and the black part of the pie chart means 72% of “n,” who have had an episode of hie (hie(+)). And the white part of the pie chart means 28% of “n,” who have not had an episode of hie (hie(−)). Each node below the root node has the same meaning.