Table 4.

Results of negative binomial regression model (Popularity).

Variables		Model 3			Model 4
		Estimate (SE)	P value	Estimate (SE)		P value
Control variables
	Work time	−0.0121 (0.0238)	.50	−0.0121 (0.0177)		.50
	Content length	2.7308 (0.1466)	<.001	2.8067 (0.1521)		<.001
	Title length	−0.2432 (0.1109)	.03	−0.4193 (0.1096)		<.001
Content variables
	Content readability	—a	—	−0.2568 (0.0223)		<.001
	Title sentiment	—	—	0.3377 (0.0346)		<.001
	|Title sentiment|	—	—	0.2638 (0.0614)		<.001
	Content sentiment	—	—	0.2060 (0.0487)		<.001
	|Content sentiment|	—	—	0.3446 (0.0594)		<.001
Context variables
	Topic diversity	—	—	0.6167 (0.1266)		<.001
	Topic intensity	—	—	0.1160 (0.1484)		.43
User variables
	Participation intensity	—	—	−0.0408 (0.0370)		.27
	Sociability breadth	—	—	−0.5515 (0.1480)		<.001
Model fit
	AICb	151,890.91	—	151,543.71		—

^aVariable has not been input.

^bAIC: Akaike information criterion.