Table 1:

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

Characteristics	SCD (0) (N=891)	SCD (1) (N=344)	SCD (≥2) (N=341)	F, p	All (N=1576)
Age (years), Mean (SD)	74 (6)	74 (6)	74 (5)	0.446, 0.640	74 (5.7)
Sex, women, Ν (%)	570 (65.5)	222 (61.2)	245 (71.4)	4.183, 0.015	1037 (65.8)
Education (years), Mean (SD)	11 (5)	13 (5)	13 (5)	15.066, ≤0.0001	12 (4.8)
Comorbidities, Mean (SD)	1.12 (0.94)	1.08 (1.1)	1.1 (0.93)	0.515, 0.598	1.12 (0.9)
Sleep/cogn meds, yes, N (%)	92 (10.6)	44 (12.1)	61 (17.7)	5.942, 0.003	197 (12.5)
Obj. cognition, z-score, Mean (SD)	0.5 (0.6)	0.7 (0.4)	0.7 (0.4)	23.851, ≤0.0001	0.585 (0.5)
Sleep problems, Mean (SD)	1.7 (0.6)	1.8 (0.6)	1.9 (0.7)	18.018, ≤0.0001	1.8 (0.6)