Table I.

Demographics of patients with atopic dermatitis in 2010

	Total		Mild		Moderate		Severe		P value
	N	%	N	%	N	%	N	%
	12,780		9369	73.31	2462	19.26	949	7.43
Age, mean ± SD, y	25.11 ± 25.95		21.52 ± 25.34		33.04 ± 24.67		39.96 ± 25.26		<.001
0–9	5804	40.86	5042	49.49	604	19.13	158	12.01
10–19	1302	7.50	833	7.16	351	8.61	118	7.90
20–29	1073	8.40	646	6.90	311	12.63	116	12.22
30–39	1031	8.07	622	6.64	297	12.06	112	11.80
40–49	957	7.49	604	6.45	249	10.11	104	10.96
50–59	923	7.22	577	6.16	239	9.71	107	11.28
60–69	613	4.80	381	4.07	154	6.26	78	8.22
70–79	624	4.88	360	3.84	163	6.62	101	10.64
≥80	453	3.54	304	3.24	94	3.82	55	5.80
Sex									<.001
Women	6798	53.19	5024	53.62	1339	54.39	435	45.84
Men	5982	46.81	4345	46.38	1123	45.61	514	54.16
Persistence of AD, y									<.001
1	5093	39.85	3910	41.73	939	38.14	244	25.71
2–5	6609	51.71	4867	51.95	1251	50.81	491	51.74
≥6	1078	8.44	592	6.32	272	11.05	214	22.55

AD, Atopic dermatitis, SD, standard deviation.