. 2024 May 31;6(3):fcae189. doi: 10.1093/braincomms/fcae189

Table 6.

Demographics of total cohort

Variable	Mean (SD)/N (%)
Education (years)	16.69 (±3.44)
Education (years)	Range: 0–38 years
Parental history of dementia	360 (51.4%)
Sex (female)	433 (61.9%)
Age (years)	51.17 (±5.47)
Age (years)	Range: 40–60^a
	No family history	With family history
APOEɛ4 non-carrier	Low risk for future dementia	Medium risk for future dementia
APOEɛ4 non-carrier	N = 232, 33.4%	N = 198, 28.5%
APOEɛ4 carrier	Medium risk for future dementia	High risk for future dementia
APOEɛ4 carrier	N = 107, 15.5%	N = 157, 22.6%
Estimated years until dementia onset (n = 348)^b	23.07 (±7.27) years

^aTwo participants were aged 60 at the time of baseline demographic data collection, data excluded from descriptive statistics presented in Table 6.

^bSample size is determined by the number of people with a reported parental history of dementia (n = 360) who provided an age of onset for their parent’s dementia. Where both parents were reported to have a diagnosis of dementia, the age of the youngest onset was used.