Table 3.

Pre-diabetes and cognitive changes.

Authors	Prevalence of IFG n (%)	Cognitive test	Cognitive changes Mean (SE); p Value
Marseglia et al. [10]	947/ 2746 (34,5 %)	MMSE	−0.06 (-0.10 to −0.02); <0.01
Rouch et al. [7]	26/163 (15.9%)	FCSR	−0.01 (0.10); 0.37 −0.03 (0.15); 0.89 0.03 (0.40); 0.49 0.01 (0.13); 0.31
		BVRT	−0.01 (0.12); 0.76
		TMT A	0.17 (0.38); 0.24
		TMT B	0.09 (0.29); 0.77
		DSST	−0.02 (0.15); 0.39
		Stroop	0.07 (0.20); 0.06
		Category Fluency Test	0.02 (0.18); 0.77
		Letter Fluency Test	−0.01 (0.19); 0.02
Samaras et al. [8]	346/1037 33.3%	WAIS III	Change reported in Z-scores: Global cognition −0.23 (0.04); 0.84 Processing Speed −0.12 (0.05); 0.10 Memory −0.15 (0.04); 0.79 Language −0.24 (0.05); 0.89 Visuospatial performance −0.07 (0.04); 0.94 Executive function −0.26 (0.06); 0.50
		TMT A
		TMT B
		Rey Auditory Verbal Learning Test
		Logical Memory Story A
		BVRT
		Category Fluency Test
		The Boston Naming Test
		Letter Fluency Test
Xu et al. [9]	In cognitively intact cohort 30/877 (3.4%), In MCI cohort 16/268 (6%)	MMSE	Incidental dementia in cognitively intact cohort 7/30 (23.3%); p 0.274 Incidental MCI in cognitively intact cohort 6/30 (21.1%) p 0.220 Incidental dementia in MCI cohort 7/16 (38.9%) p 0.221