Table 3. Mean Annualized Prevalence of Granuloma Annulare in the United States (January 1, 2017, to December 31, 2018).

Population	Granuloma annulare cases, No.	Prevalence per 100 000 (95% CI)	Prevalence, %
All granuloma annulare cases	8930	58.3 (57.1-59.5)	0.06
Sex
Female	6774	86.2 (84.1-88.3)	0.09
Male	2157	28.9 (27.7-30.1)	0.03
Age, y
≤19	468	19.1 (17.4-20.9)	0.02
20-29	335	19.9 (17.7-22.0)	0.02
30-39	647	33.4 (30.9-36.0)	0.03
40-49	953	51.7 (48.4-55.0)	0.05
50-59	1771	91.5 (87.3-95.8)	0.09
≥60	4757	86.8 (84.3-89.3)	0.09
Race/ethnicity
White	6370	72.7 (70.9-74.4)	0.07
Black	388	30.7 (27.6-33.7)	0.03
Hispanic	547	33.6 (30.8-36.4)	0.03
Asian	126	20.5 (16.9-24.1)	0.02
Other or unknown	1500	49.2 (46.7-51.7)	0.05
Income, $
<49 000	1341	47.5 (44.9-50.0)	0.05
50 000-74 000	1165	61.3 (57.8-64.8)	0.06
75 000-99 000	1169	70.8 (66.8-74.9)	0.07
≥100 000	3034	75.3 (72.6-78.0)	0.08
Unknown	2221	45.1 (43.3-47.0)	0.05
Educational level
Less than 12th grade	16	21.1 (10.6-31.6)	0.02
High school diploma	1483	45.6 (43.3-47.9)	0.05
Less than bachelor degree	4346	62.7 (60.8-64.5)	0.06
Bachelor degree plus	1939	74.4 (71.1-77.7)	0.07
Unknown	1148	46.7 (44.0-49.4)	0.05