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Table 4 The percentage of ADE deaths that are at a high risk of re-identification by matching to an obituary for different combinations of quasi-identifiers

From: Evaluating the risk of patient re-identification from adverse drug event reports

Quasi-identifiers

ADE records at risk (%)

Province

Age at death

Gender

Day of report

Month of report

Year of report

p = 0.5

p = 0.7

p = 0.9

 

X

X

X

X

X

1.95

3.46

5.05

 

X

X

 

X

X

0

0

0

 

X

X

  

X

0

0

0

 

2 yr

X

  

X

0

0

0

 

5 yr

X

  

X

0

0

0

 

10 yr

X

  

X

0

0

0

X

X

X

X

X

X

18.44

25.17

30.78

X

X

X

 

X

X

0.21

0.4

0.63

X

X

X

  

X

0.12

0.24

0.39

X

2 yr

X

  

X

0.04

0.07

0.13

X

5 yr

X

  

X

0.02

0.03

0.05

X

10 yr

X

  

X

0

0

0.01

  1. We considered age converted into a 2 year interval, 5 year interval, and a 10 year interval.
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BMC Medical Informatics and Decision Making

ISSN: 1472-6947

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