Table 1.

Demographic variables and candidate predictors of conversion.

Demographic or predictor variable	MCI – converters (mean ± SE)	MCI – non-converters (mean ± SE)	Difference statistic	p-value*	Cohen’s d (effect size)
Gender	2 F:7 M	2 F:4 M	X21 = 0.227	0.63	–
Age	71.7 ± 3.0	65.2 ± 3.4	T13 = 1.41	0.18	0.75
Years of education	12.1 ± 0.7	11.0 ± 0.5	T13 = 1.19	0.26	0.67
NART estimated IQ	106.6 ± 3.9	114.7 ± 3.4	T10 = 1.50	0.16	0.90
4MT score	5.56 ± 0.71	10.17 ± 0.60	T13 = 4.60	0.0005	2.52
TMT-B (s)	132.55 ± 14.98	80.78 ± 8.36	T12 = 2.74	0.018	1.56
RAVLT score	2.38 ± 0.62	3.33 ± 0.14	T12 = 0.79	0.45	0.41
MMSE score	27.89 ± 0.42	27.33 ± 0.21	T13 = 1.01	0.33	0.58
Total hippocampal volume (% of total intracranial volume)	0.509 ± 0.037	0.577 ± 0.45	T11 = 1.18	0.26	0.65
CSF total tau:β-amyloid1–42	3.57 ± 0.92	0.45 ± 0.09	T11 = 3.12	0.001	1.81

MCI, mild cognitive impairment; 4MT, Four Mountains Test; TMT-B, Trail Making Test B; RAVLT, Rey Auditory Verbal Learning Test; MMSE, Mini Mental State Examination.

*Uncorrected p-values.

Bold font signifies p-values that are statistically significant at the p < 0.05 level.