Table 1.

Total number of posts, posts containing URLs, URLs, and mean URLs per post for each WebMD community.

Community	Total posts	Posts containing URLs, n (%)	Total URLs	URLs per post
Heart	14,033	3107 (22.14)	16,146	1.15
Diabetes	71,168	2079 (2.92)	3586	0.05
Weight loss	58,344	956 (1.64)	1474	0.03
Breast cancer	26,653	729 (2.74)	1376	0.05
Sexual health	68,113	677 (0.99)	849	0.01
MS	28,267	527 (1.86)	848	0.03
ADHD	9637	363 (3.77)	697	0.07
Pain	8108	203 (2.50)	373	0.05
Addiction	3806	61 (1.60)	95	0.02
Fit kids	220	12 (5.5)	17	0.08