Table 2.

Demographics of Twitter users sampled.

Characteristic		Users (N=149), n (%)
Gender
	Female	105 (70.0)
	Male	31 (21.0)
	Unknown	13 (9.0)
Country
	United States	68 (45.5)
	United Kingdom and Northern Ireland	39 (26)
	Canada	18 (12.0)
	Australia	1 (0.7)
	France	1 (0.7)
	Germany	1 (0.7)
	India	1 (0.7)
	New Zealand	1 (0.7)
	Unknown	19 (13.0)
Diagnostic category
	Arthritis (specific arthritis type unclear)	86 (58.0)
	Rheumatoid arthritis	32 (21.0)
	Systemic lupus erythematosus	12 (8.0)
	Psoriatic arthritis	10 (7.0)
	Ankylosing spondylitis	3 (2.0)
	Osteoarthritis	3 (2.0)
	Juvenile idiopathic arthritis	3 (2.0)