Table 2.

Example of topics and their probabilities assigned to each tweet.

Category	Tweet	Top 3 topics (topic probability)
Promotional	“What is risk of pts w #Lynchsyndrome developing various cancers over time? Population-based study offers answers.”	Risk (.644), genetic testing (.197), treatment (.118)
	“Adapting to body changes during #cancer treatment #LynchSyndrome”	Treatment (.533), patient (.276), family (.139)
Laypeople	“I have Lynch Syndrome with 60-80% chance of dying from colon cancer just like my mother and brother #IAmAPreexistingCondition”	Family and hereditary (.442), screening (.327), patient (.172)
	“My #breastcancer diagnosis caused me to get a #genetics test & found out I have a gene 4 #LynchSyndrome #earlydetection #ColonCancerMonth”	Patient (.716), risk (.128), awareness/awareness event (.119)