Table 7.

Contingency tables for the structured-unstructured pair “Opioid abuse, unspecified use” (A) and “junk (heroin)” (B).

Cases			Non-cases
Concept	B: 1	B: 0	Concept	B: 1	B: 0
A: 1	0.0443	0.0079	A: 1	0.0022	0.0010
A: 0	0.1071	0.7820	A: 0	0.0297	0.9085

This feature pair has a low IH value of 3.95. Values shown are proportions of the total number of samples (23,566) for each bin. The differences between the two distributions are smaller in Table 7 than in Table 6, resulting in a lower IH value.