Table 2:

Demographic and clinical characteristics of the HELIAD participants, by SCD groups (SCD=0, SCD=1, SCD≥2).

Characteristics	SCD (0) (N=388)	SCD (1) (N=617)	SCD (≥2) (N=451)	F, p	All (N=1456)
Age (years), Mean (SD)	72 (5)	73 (5)	73 (5)	4.848, 0.008	73 (5.2)
Sex, women, Ν (%)	220 (56.7)	359 (58.2)	297 (65.9)	3.244, 0.039	880 (60.5)
Education (years), Mean (SD)	9.3 (5.5)	7.2 (4.3)	8.3 (4.6)	22.449, ≤0.0001	7.8 (4.7)
Comorbidities, Mean (SD)	0.8 (0.8)	1.1 (0.8)	1.1 (0.9)	8.820, ≤0.0001	1.05 (0.88)
Sleep/cogn meds, yes, N (%)	54 (13.9)	108 (17.5)	95 (21.1)	6.569, 0.001	257 (17.7)
Obj. cognition, z-score, Mean (SD)	0.14 (0.6)	−0.16 (0.72)	−0.02 (0.66)	19.172, ≤0.0001	−0.078 (0.7)
Sleep problems, Mean (SD)	1.8 (0.8)	1.9 (0.8)	2.1 (0.9)	12.467, ≤0.0001	1.96 (0.8)