Table 4:

Classification of secondary PxI and examples identified during manual review

Class	Information Domain	Example
Health related secondary information	Diagnosis	Her mother and daughter both have symptoms of multiple sclerosis.
		Patient started on antibiotic post exposure prophylaxis for pertusis (daughter tested positive)
Non-health secondary information with an identifier (secondary PII)	Name	I had a frank 2 hour discussion with Ms Doe and her husband and her daughter Alice.
		She was accompanied in our meeting by her husband and her daughter Alice
	location	His daughter lives in Richmond.
	phone	Mrs. Doe daughter Alice Carol Smith (123-123-1234) contacted research nurse Alice Jones, R.N., and requested that I call her.
		I attempted to reach Mrs. Smith (cell 123-123-1234) this morning to convey our condolences on Mr. Smith passing earlier this morning.
	age	He is married and has a 9-year-old daughter.
	combination	Mr. Doe young adult daughters (ages 18 and 23) as well as his sister and sister-in-law are anticipated to arrive this evening from Cleveland around 8:30pm.
		SH: … Happily married. One son lives in Annandale – active duty Army. Daughter in Pennsylvania. 3 grandkids.
		Mrs. Doe was accompanied by her daughters Alice and Carol who drove her from Pennsylvania for the procedure.
Non-health secondary information without a secondary identifier	n/a	Pt did ROM exercises in bed with her daughter.
		We discussed in detail with patient, spouse and daughter the progression of disease based on radiographic findings and worsening symptoms
		The daughter-in-law will be returning with Ms Smith between 10am – 12pm tomorrow for dressing change, supplies, and d/c instructions. (data note: Smith is the primary patient)
		She stated that his daughters did arrive to the hospital but the sons had not made it.