Epidemiology and long-term disease burden of herpes zoster and postherpetic neuralgia in Taiwan: a population-based, propensity score-matched cohort study

Table 1 Number of herpes zoster cases and annual incidence^a

	2004		2005		2006		2007		2008		p-value for trend ^b
	Cases	Incidence	Cases	Incidence	Cases	Incidence	Cases	Incidence	Cases	Incidence	p-value for trend ^b
Overall	111,628	5.04	118,349	5.30	118,998	5.29	122,590	5.38	129,525	5.65	< 0.01
Aged 0–49	56,167	3.34	59,855	3.57	57,408	3.44	57,431	3.42	59,901	3.59	< 0.01
Aged 50–64	29,449	9.20	31,795	9.45	33,786	9.55	35,857	9.69	38,710	9.98	< 0.01
Aged 65–74	15,515	12.28	15,563	12.10	15,824	12.10	16,637	12.50	17,376	12.81	< 0.01
Aged 75–84	8938	12.58	9405	12.57	10,120	13.01	10,462	13.05	11,075	13.52	< 0.01
Aged 85+	1559	11.15	1731	11.39	1860	10.97	2203	11.81	2463	12.41	< 0.01

^aCrude incidence rate: cases per 1000 person-year
^bTrends in annual incidence were analyzed using Cochrane-Armitage trend tests [27]

ISSN: 1471-2458