Table 1.

Comparison of opinion leaders, followers, and general users.

Twitter user characteristics		Opinion leaders (n=347)	Followers (n=567)	General users (n=519)	P value
Social network size
	Number of Twitter users who follow the respondent (median)	1000	554	503	.001
	Number of Twitter users whom the respondent follows (median)	428	375	366	.01
Age (years)		24.2	22.4	25.2	<.001
Female, n/N (%)		122/242 (50.4)	211/392 (53.8)	202/360 (56.1)	.39
Race and ethnicity, n/N (%)
	African American	26/242 (11)	40/392 (10)	67/360 (19)	.03
	Asian or Pacific Islander	15/242 (6)	21/392 (5)	14/360 (4)	.03
	Hispanic	51/242(21)	102/392 (26)	74/360 (21)	.03
	White	129/242 (53)	201/392 (51 )	176/360 (49)	.03
	Other	21/242 (9)	28/392 (7)	29/360 (8)	.03
Education, n/N (%)
	High school or less	85/241 (35)	155/380 (41)	109/350 (31)	<.001
	Some college	111/241 (46)	185/380 (49)	149/350 (43)	<.001
	Bachelor’s degree or higher	45/241 (19)	40/380 (11)	92/350 (26)	<.001
Number of tobacco products used in past month (mean)		1.31	.98	.66	<.001
Use of specific products in the past month, n/N (%)
	Cigarettes	93/347 (27)	117/567 (21)	83/519 (16)	.01
	E-cigarettes	65/347(19)	93/567 (16)	50/519 (10)	.01
	Cigar	30/34 (9)	37/567 (7)	23/519 (4)	.04
	Pipe	37/347 (11)	64/567 (11)	28/519 (6)	.01
	Blunt	96/347 (28)	118/567 (21)	73/519 (14)	.01
	Hookah	45/347 (13)	51/567 (9)	29/519 (6)	.01
	Smokeless	13/347 (4)	7/567 (1)	11/519 (2)	.04
	Cigarillo	60/347 (17)	67/567 (12)	41/519 (8)	.01
Other substance use in the past month, n/N (%)
	Alcohol	159/229 (69)	221/378 (58)	215/354 (61)	.02
	Marijuana	103/219 (47)	142/371 (38)	96/330 (29)	<.001
Nicotine dependence score (mean)		1.48	1.18	1.02	.04
Number of tobacco brands followed on Twitter (mean)		.23	.18	.13	.11