Table 1.

Example dataset with three quasi-identifiers forming eight equivalence classes

Subject	Age	Sex	Geography	Equivalence class
1	30	Male	X	I
2	30	Male	X	I
3	30	Male	Y	II
4	30	Male	Y	II
5	30	Female	X	III
6	30	Female	X	III
7	30	Female	Y	IV
8	30	Female	Y	IV
9	35	Male	X	V
10	35	Male	X	V
11	35	Male	Y	VI
12	35	Male	Y	VI
13	35	Female	X	VII
14	35	Female	X	VII
15	35	Female	Y	VIII
16	35	Female	Y	VIII