Summary of findings 2. Table of descriptive data.

ID	Country of Study	Setting	Years of education	Language(s) of tests	MMSE Diagnostic Threshold	Target condition	Definition of dementia	Follow‐up	Definition MCI
Buchhave 2008	Sweden	Memory clinic	Not provided	Unclear	28/29	ADD	DSM III‐R + NINCDS‐ADRDA	5,2 years (4 to 6.8)	Petersen criteria
Conde‐Sala 2012	Spain	Memory clinic	50% had attended school for six to eight years	Spanish	21/22	ADD	DSM‐IV‐TR or NINCDS‐ADRDA	5 years	European AD consortium (EADC) criteria for MCI
Chopard 2009	France	Memory clinic	≥ 12 years of education = 8.5%	Unclear	26/27	All‐cause dementia	IADLs scores affected + CDR = 0.5 to 1 and DSM‐IV + CDR = 1 + plus NINCDS‐ADRDA or NINDS‐AIREN or criteria for DLB or Lund and Manchester criteria	14.9 months (± 4.5)	Presence of cognitive complaints + no daily activities affected + CDR = 0.5 + no DSM‐IV criteria for dementia
Devanand 2008	USA	Memory clinic	Converters = 14 (4.7) Non‐converters= 15.4 (4.1)	English	Not provided	ADD	DSM‐IV + NINCDS‐ADRDA	3 years	Petersen criteria
Meguro 2007a	Japan	Population sample	8.3 years	Japanese	17/18 for 6 or less years of education 20/21 for 7 to 8 years 23/24 for 10 or more years	All‐cause dementia	DSM‐IV + CDR = 1 + plus NINCDS‐ADRDA or NINDS‐AIREN or criteria for DLB or Lund and Manchester criteria	5 years	CDR = 0.5
Meguro 2007b	Japan	Population sample	No provided	Japanese	17/18 for 6 or less years of education 20/21 for 7 to 8 years 23/24 for 10 or more years	All‐cause dementia	DSM‐IV + CDR = 1	7 years	CDR = 0.5
Modrego 2005	Spain	Outpatient clinic	No provided	Spanish	26/27 from 35; 29/30 from 35	ADD	NINCDS‐ADRDA	1 to 5 years	Petersen criteria for amnestic MCI
Modrego 2013	Spain	Outpatient clinic	Converters = elementary: 78.9%; high school: 17.5%; university: 3.5% Non‐converters = elementary: 79.2%; high school: 12.5%; university: 8.3%	Spanish	30/31 from 35	ADD	NINCDS‐ADRDA	2 years (1 to 4)	CDR = 0.5 + BDRS < 4
Palmqvist 2012	Sweden	Memory clinic	No provided	Swedish	26/27; 9/10 for O&R subscale	ADD	NINCDS‐ADRDA	5.9 years (3.2 to 8.8)	Petersen criteria
Pozueta 2011	Spain	Memory clinic	% primary school: Pr‐AD = 66.6 S‐MCI = 71.42	Spanish	26/27	ADD	Unclear	2 years	Petersen criteria
Xu 2002	USA	Outpatient research clinic	Non‐dementia = 12.17 (5.23) All dementias = 10.06 (6.11)	English	26/27 for dementia or AD; 25/26 for VaD	All‐cause dementia, ADD VaD	NINCDS‐ADRDA or NINDS‐AIREN or criteria for dementia by Lewy bodies or Lund and Manchester criteria or NINDS‐SPSP	3.89 (2 to 17)	Unclear

See 'Characteristics of included studies' for more detailed study descriptors.

Abbreviations: ADD = Alzheimer´s Disease Dementia; CDR = Clinical Dementia Rating; DSM = Diagnostic and Statistical Manual of Mental Disorders; ICD‐10 = International Statistical Classification of Diseases and Related Health Problems 10th Revision; MCI = Mild cognitive Impairment; MMSE = Mini‐Mental State Examination; NINCDS‐ADRDA = National Institute of Neurological and Communicative Disorders and Stroke and the Alzheimer´s Disease and Related Disorders Association; NINDS‐AIREN = National Institute of Neurological Disorders and Stroke and Association Internationales pour la Recherche et l´Ensignement en Neurosciences; O&R = MMSE´s Orientation and Recall items; Pr‐AD = Prodormal AD; USA = United States of America; VaD = Vascular Dementia.