Table 1.

Total counts of ED visits in the exposed and referent counties by outcomes, age group, and sex, between 1 June and 14 July 2008.

Age (years)			Sex
Counties/outcomes	Total	< 65	≥ 65	Female	Male
Exposed counties
Respiratory outcomes
Alla	4,702		3,485		1,217		2,963		1,739
Asthma (ICD-9 493)	2,081		1,775		306		1,463		618
COPD (ICD-9 491, 492)	647		314		333		317		330
Pneumonia and acute bronchitis (ICD-9 481, 482, 485, 486, 466)	1,053		607		446		575		478
URIs (ICD-9 465)	444		189		255		202		242
Cardiac outcomes
Allb	6,078		2,037		4,041		3,357		2,721
Myocardial infarction (ICD-9 410, 411)	444		189		255		202		242
Heart failure (ICD-9 428)	1,817		579		1,238		1,068		749
Cardiac dysrhythmias (ICD-9 427)	1,756		538		1,218		937		819
Respiratory/other chest symptoms (786)	7,716		5,752		1,964		4,532		3,184
Referent counties
Respiratory outcomes
Alla	6,074		4,347		1,727		3,819		2,255
Asthma (ICD-9 493)	2,199		1,886		313		1,591		608
COPD (ICD-9 491, 492)	1,158		558		600		601		557
Pneumonia and acute bronchitis (ICD-9 481, 482, 485, 486, 466)	1,815		1,146		669		1,039		777
URIs (ICD-9 465)	490		429		61		344		146
Cardiac outcomes
Allb	7,999		2,704		5,295		4,279		3,720
Myocardial infarction (ICD-9 410, 411)	674		334		340		288		386
Heart failure (ICD-9 428)	2,374		740		1,634		1,337		1,037
Cardiac dysrhythmias (ICD-9 427)	2,580		785		1,795		1,381		1,199
Respiratory/other chest symptoms (786)	10,102		7,801		2,301		5,968		4,134
Minimum ages for respiratory and cardiac outcomes were 19 and 45 years, respectively.aAll respiratory ICD-9 codes: 465, 466, 480, 481, 482, 483, 484, 485, 486, 490, 491, 492, 493. bAll cardiac ICD-9 codes: 410, 411, 413, 415, 416, 417, 420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 434, 435, 444, 445, 451.