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Table 4 Approaches used for each of the six suspected matches

From: Evaluating the re-identification risk of a clinical study report anonymized under EMA Policy 0070 and Health Canada Regulations

Approach

External source

Confidence score

Confidence group

Reason for confidence score

Social media

Facebook

2

Low

Date of surgery + location + symptoms + diabetic (inferred)

Social media

Reddit

1

Low

Date of surgery + age + gender + diabetic

Death records

Ancestry.com

1

Low

Age + date of death + ethnicity (inferred) + unknown diabetic status

Death records

Ancestry.com

1

Low

Age + date of death + ethnicity (inferred) + unknown diabetic status

Death records

Ancestry.com

1

Low

Age + date of death + ethnicity (inferred) + unknown diabetic status

Death records

Ancestry.com

2

Low

Age + diabetic (inferred) + details of death + location