. 2021 Apr 30;5(4):e22983. doi: 10.2196/22983

Table 3.

Characteristics of layperson, medical, and technical groups.

Characteristics			Groups
			Layperson		Medical		Technical
Number of members, mean (SD)			7623 (19,480)^a		21,215 (35,040)^a		33,948 (39,578)
Public privacy setting, n (%)			123 (54)^b		3 (12)^b		2 (100)
Security requirement to attain membership, n (%)
	Yes	98 (43)^c		21 (81)^c		2 (100)
	Request	110 (48)		4 (15)		0
	No	21 (9)		1 (4)		0
English language, n (%)			193 (84)		20 (77)		2 (100)

^aSignificant difference in the number of members between layperson and medical groups (P<.01).

^bSignificant difference in public privacy setting between layperson and medical groups (P<.001).

^cSignificant difference in the presence of security requirements to attain membership between layperson and medical groups (P<.001).