Table 7 Example showing the eight combinations when we have two hierarchical quasi-identifiers where we disclose all of their levels
From: De-identifying a public use microdata file from the Canadian national discharge abstract database
Combination ID |    PROV_XXX |    AGE_GROUP |    GENDER_CODE |    MRDx |    CMG_CODE |    DIAG_BLOCK |    DIAG_CHAPTER |    CCI_CODE |    SHORT_CCI |
|---|---|---|---|---|---|---|---|---|---|
2a |    X |    X |    X |    X |  |  |  |    X |  |
2b |    X |    X |    X |  |    X |  |  |    X |  |
2c |    X |    X |    X |  |  |    X |  |    X |  |
2d |    X |    X |    X |  |  |  |    X |    X |  |
2e |    X |    X |    X |    X |  |  |  |  |    X |
2f |    X |    X |    X |  |    X |  |  |  |    X |
2g |    X |    X |    X |  |  |    X |  |  |    X |
2h |    X |    X |    X |  |  |  |    X |  |    X |