Appendix B.

Sample Equivalent Items

	Measure	Study, Language	Item	Response options	Time frame
Set 1	Multifactorial Memory Questionnaire, MMQ	Bonn Memory Clinic, German	A: Forget a telephone number you use frequently	0=always;	previous two weeks
				1=often;
				2= sometimes;
				3= rarely;
				4= never
	Cognitive Difficulties Scale, CDS-Q	IMAP Caen Group, French	B: Trouble recalling frequently used phone numbers	0=never;	lately
				1=rarely;
				2=sometimes;
				3=often;
				4=very often;
Set 2	Structured Telephone Dementia Assessment, STDA	Harvard Brain Aging Study, English	C: Do you have trouble remembering things from one second to the next?	0=no; 1=yes	current
	VMAC Cognitive Complaint Questionnaire, VMAC CCQ	Vanderbilt Memory and Alzheimer’s Center, English	D: Do you have trouble remembering things from one moment to the next?	0=no; 1=yes	current

Note. Highlighted response options (rarely, never) for items A and B in Set 1 were combined for purposes of data harmonization due to the categories having fewer than five respondents (see Data Recoded). In addition, highlighted response options (often, very often) for item B in Set 1 were combined to establish equivalent response categories (see Item Overlap).