Differentially private release of medical microdata: an efficient and practical approach for preserving informative attribute values

Table 12 Result of query Q₄

Age group	Original	The proposed method	k-anonymization
10	3.0	1.0	15.0
20	3.0	1.4	15.0
30	7.7	2.8	15.0
40	1.7	2.4	11.7
50	2.7	3.6	11.7
60	3.5	3.2	11.7
70	3.5	4.7	21.1
80	5.6	6.1	21.1
90	8.0	8.5	21.1

ISSN: 1472-6947