Table 1.

Content of Facebook Group Descriptions and Wall Posts

Code	N	% of all posts	Interrater Reliability (kappa)
Social context of drinking	51	21
Bars	46	19	.96
Partying	9	4	.57
Sense of belonging to larger community	133	54
Merchandise	43	17	.97
Holiday	37	15	.70
University	33	13	.77
Media attention	19	8	.84
Social norms of drinking	43	17
Alcohol/drinking	38	15	.86
Safety/responsible behavior	3	1	.66
Law enforcement/police	2	<1	.83
Consequences
Physical/behavioral consequences	6	2	.69

N=248 total group descriptions and wall posts. Ns for the main categories (e.g., “Social context of drinking”) are sums of any responses in that category, minus any duplicates (e.g., a post that was coded as both bars and partying). Note that main categories add to less than 248 because some wall posts could not be coded into any of the categories presented.