Table 2.

Descriptive Statistics of Diagnostic Groups Presented in the Current Review

Characteristics	Overall	AD	MCI	HC
Total Number Patients, n	6757	2350	793	2902
Sample size, n
Mean ± SD	–	38.52 ± 46.44	30.50 ± 35.53	46.81 ± 56.38
Median [min; max]		25 [2; 324]	24 [7; 192]	31 [8; 414]
Age at baseline, years
Mean ± SD	–	72.78 ± 3.69	71.52 ± 2.88	70.55 ± 3.85
Sex (F), n (%)	–	1247 (53.1)	338 (42.6)	1343 (46.3)

Notes: Values are shown as mean ± SD, unless otherwise noted.

Abbreviations: AD, Alzheimer’s disease; HC, healthy controls; MCI, mild cognitive impairment; SD, standard deviation.