Table 2.

Characteristics of included tweets (n=1859).

Characteristics			Values
Category, n (%)
	Advertising	31 (1.7)
	Awareness	559 (30.1)
	Experience	296 (15.9)
	Fundraising	7 (0.4)
	Other	205 (11)
	Research	761 (40.9)
Total engagement, median (IQR)			1 (0-3)
Total engagement, mean (SD)			4.1 (15.5)
Engagement by category, mean (SD)
	Replies	1.75 (8.59)
	Retweets	0.15 (0.84)
	Likes	2.14 (10.03)
	Quotes	0.07 (0.40)
Sentiment, n (%)
	Positive	717 (38.6)
	Negative	295 (15.9)
	Neutral	847 (45.6)