Table 4.

Approaches used for each of the six suspected matches

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