1. Characteristics of included studies.

Study ID	Country	Participants (N)	Setting	Mini‐Cog scoring	Dementia diagnosis	Dementia prevalence	Notes
Borson 2000	Seattle, US	249	Community sample assessed at memory clinic	Standard scoring	DSM‐IV, NINCDS‐ADRDA	51.8%	Excluded participants with MCI
Borson 2003	Pennsylvania, US	1119	Random sample of persons in geographic region	Standard scoring	DSM‐III R, NINCDS‐ADRDA	6.8%	Excluded participants with MCI
Borson 2005/2006	Seattle, US	252	Community sample referred for cognitive screening	Standard scoring	DSM‐IV, NINCDS‐ADRDA	44.4%