Environmental Health

Table 1 Characteristics of patients admitted to an emergency room for influenza in Massachusetts, October 1, 2002 - September 30, 2008

From: Extreme precipitation and emergency room visits for influenza in Massachusetts: a case-crossover analysis

Influenza (n = 23,510)
Characteristic		Number	Percent
Age in years	0–4	2969	12.63
	5–18	4221	17.95
	19–64	15,036	63.96
	65+	1284	5.46
Gender	Female	12,288	52.27
	Male	11,220	47.72
	Unknown	2
Race/Ethnicity	White	14,694	65.07
	Black	2881	12.76
	Other	5008	22.18
	Unknown	587
Year	2002^a	362	1.54
	2003	6303	26.81
	2004	2761	11.74
	2005	3075	13.08
	2006	3409	14.50
	2007	1840	7.83
	2008^a	5760	24.50

^aPartial year. The study period was October 1, 2002 – September 30, 2008

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ISSN: 1476-069X

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