Table 2. Prevalence of chronic urticaria (per 100,000 person-years) by age and sex.

Characteristics	Prevalence rate (95% CI)
	Crude	Age-standardized
Total	2,256.2 (2,252.3–2,260.6)	2,138.4 (2,134.3–2,142.4)
Sex
Male	1,884.5 (1,879.1–1,889.9)	1,819.2 (1,813.9–1,824.6)
Female	2,633.3 (2,626.9–2,639.7)	2,466.8 (2,460.7–2,472.9)
Age group (year)
<10	3,253.6 (3,237.1–3,270.1)
10–29	1,470.9 (1,464.3–1,477.6)
30–64	2,188.9 (2,183.2–2,194.5)
≥65	3,601.5 (3,585.6–3,617.4)

CU, chronic urticaria; CI, confidence interval.