Table 1.

MindCrowd, UKBb MindCrowd, and UK Biobank’s sociodemographic characteristics.

Cohort	Descriptive or factor level	n	%
1. MindCrowd 18–85 years: age	M = 46.54 SD = 18.40	75,666	100
UKBb MindCrowd 40–70 years: age	M = 56.59 SD = 8.16	39,795	100
UK Biobank 40–70 years: age	M = 55.81 SD = 7.72	158,249	100
2. MindCrowd 18–85 years: biological sex	Women	47,700	63.08
	Men	27,966	36.91
UKBb MindCrowd 40–70 years: biological sex	Women	29,640	74.51
	Men	10,155	25.49
UK Biobank 40–70 years: biological sex	Women	89,333	56.45
	Men	68,916	43.55
3. MindCrowd 18–85 years: Race	Asian	3511	4.64
	Black/African American	1570	2.07
	Mixed	497	0.66
	Native American	447	0.59
	Native Hawaiian/Pacific Islander	271	0.36
	White	68,450	90.46
UKBb MindCrowd 40–70 years: Race	Asian	750	1.88
	Black/African American	740	1.86
	Mixed	185	0.46
	White	37,446	94.10
UK Biobank 40–70 years: Race	Asian	1612	1.02
	Black/African American	980	0.62
	Mixed	847	0.54
	White	154,810	97.83
4. MindCrowd 18–85 years: FHAD	True	17,847	23.59
	False	57,819	76.41
UKBB MindCrowd 40–70 years: FHAD	True	13,748	34.59
	False	26,047	65.41
UK Biobank 40–70 years: FHAD	True	19,742	12.48
	False	138,507	87.52
5. MindCrowd 18–85 years: handedness	Left	8449	11.17
	Right	66,903	88.42
UKBb MindCrowd 40–70 years: handedness	Left	4520	11.36
	Right	35,034	88.04
UK Biobank 40–70 years: handedness	Left	15,287	9.66
	Right	142,962	90.34
6. MindCrowd 18–85 years:	No high school diploma	1881	2.49
Educational attainment	High school diploma	6695	8.85
	Some college	22,950	30.33
	College degree	44,140	58.34
UKBb MindCrowd 40–70 years:	No high school diploma	605	1.52
Educational attainment	High school diploma	3176	7.98
	Some college	11,139	27.99
	College degree	24,875	62.51
UK Biobank 40–70 years:	No high school diploma	10,978	6.94
Educational attainment	High school diploma	46,248	29.23
	Some college	77,271	48.83
	College degree	23,752	15.01

List of ns and related percentages of commonly reported sociodemographic factors from MindCrowd, UKBb MindCrowd, and the UK Biobank.