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Oregon EPHT Heart Attack Hospitalizations

Heart Attack Indicator:   Hospitalizations

Measure : Average daily number of hospitalizations

 

Data used in the calculation of these measures were collected by the Oregon Association of Hospitals and Health Systems for the Hospital Discharge Index (HDI). The HDI provides a central database of all Oregon hospital discharges for public health surveillance and hospital policy analysis. Information on emergency room visits, urgent care, outpatient surgery and clinic visits is not included in this database.

 

Before EPHT,  there was no single heart attack surveillance system in place in the US. Mortality was currently the sole descriptor for national data for heart attacks. Estimates of incidence and prevalence of heart attacks and coronary heart disease were largely based on survey samples or large cohort studies. 

 

Tracking heart attack hospitalizations will provide more information than death certificates or surveys, and will help with examination of time and geographic trends in heart attack hospitalizations, and evaluation of differences by age, gender and race/ethnicity.

 

Research in various countries has shown that the frequency of heart attacks varies by season. Several explanations for the higher incidence of heart attacks in the cold season have been suggested. Lower temperatures have been found to be associated with higher levels of heart disease risk factors, such as high blood pressure and high overall cholesterol as well as LDL (“bad”) cholesterol. Elevated levels of factors related to the formation of blood clots, which trigger heart attacks, have also been observed in winter. The lack of sunshine during the cold season leads to reduced levels of vitamin D, which may contribute to an increased risk of a heart attack. Furthermore, respiratory tract infections, which have been linked to heart attacks, also occur more frequently in winter.

 

The tables and graph below show that Oregon follows a similar pattern of seasonal variation of heart attack hospitalizations. The average daily number of heart attack hospitalizations are presented by month for the state and individual counties.   

 

Table 1:  Average daily number of hospitalizations for Oregon by year 

 

Table 2:  Average daily number of hospitalizations by county and month 

 

Graph 1:  Average daily number of hospitalizations in Oregon, averaged from 2000 to 2006, by month 

 

___________________________________________________________________________________________________

 

Table 1:  Average daily number of hospitalizations for Oregon by year

 

 

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

2000

17.2

19.1

18.1

18.6

16.5

17.7

16.9

16.4

16.8

16.2

18.1

19.8

2001

17.3

18.9

18.0

17.6

17.9

16.4

16.1

16.4

16.3

19.0

18.4

21.0

2002

20.2

20.0

18.9

19.3

18.8

18.9

17.6

17.5

18.6

18.0

17.7

19.5

2003

18.0

20.6

18.9

20.2

19.6

17.4

17.6

17.9

17.4

18.5

18.8

18.8

2004

18.9

18.4

18.2

18.1

16.2

16.0

16.5

14.6

16.0

17.9

18.6

17.7

2005

18.6

19.6

18.6

17.4

16.7

16.1

16.7

14.6

15.6

15.2

16.9

17.8

2006

16.2

18.5

17.9

17.7

17.2

18.4

16.7

14.9

16.7

16.0

18.6

16.2

___________________________________________________________________________________________________

Table 2:  Average daily number of hospitalizations by county and month

 

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Oregon

18.1

19.3

18.4

18.4

17.6

17.3

16.9

16.0

16.8

17.3

18.1

18.7

Baker

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Benton

0.3

0.2

0.2

0.2

0.3

0.2

0.2

0.2

0.2

0.2

0.2

0.2

Clackamas

1.7

1.8

1.5

1.7

1.7

1.6

1.6

1.5

1.6

1.7

1.6

1.8

Clatsop

0.3

0.3

0.3

0.2

0.2

0.3

0.3

0.3

0.3

0.3

0.3

0.3

Columbia

0.3

0.3

0.3

0.4

0.3

0.3

0.3

0.3

0.2

0.2

0.2

0.3

Coos

0.7

0.8

0.6

0.7

0.6

0.6

0.6

0.6

0.6

0.6

0.7

0.6

Crook

0.2

0.1

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.2

0.1

0.1

Curry

0.1

0.2

0.2

0.2

0.2

0.1

0.2

0.2

0.2

0.2

0.2

0.1

Deschutes

0.7

0.9

0.8

0.8

0.8

0.7

0.7

0.6

0.6

0.6

0.7

0.7

Douglas

0.6

0.8

0.7

0.7

0.7

0.7

0.7

0.6

0.7

0.7

0.7

0.7

Gilliam

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Grant

0.0

0.1

0.0

0.0

0.0

0.1

0.1

0.0

0.0

0.1

0.0

0.1

Harney

0.1

0.0

0.1

0.1

0.1

0.0

0.0

0.0

0.1

0.1

0.1

0.0

Hood River

0.1

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.2

0.1

Jackson

1.0

1.1

1.0

1.0

1.1

1.0

0.9

1.0

1.0

1.0

1.0

1.1

Jefferson

0.1

0.1

0.2

0.1

0.2

0.1

0.1

0.1

0.2

0.1

0.2

0.2

Josephine

0.7

0.8

0.7

0.8

0.8

0.8

0.7

0.7

0.6

0.7

0.6

0.7

Klamath

0.4

0.4

0.4

0.5

0.5

0.4

0.4

0.4

0.4

0.4

0.4

0.4

Lake

0.1

0.1

0.1

0.1

0.0

0.1

0.0

0.0

0.0

0.1

0.1

0.1

Lane

1.5

1.7

1.6

1.6

1.5

1.5

1.6

1.4

1.4

1.5

1.5

1.5

Lincoln

0.4

0.3

0.4

0.5

0.3

0.4

0.4

0.3

0.3

0.3

0.4

0.4

Linn

0.8

0.8

0.6

0.8

0.7

0.7

0.7

0.7

0.7

0.6

0.8

0.8

Malheur

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Marion

1.2

1.4

1.6

1.3

1.2

1.3

1.2

1.2

1.4

1.5

1.6

1.5

Morrow

0.0

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

Multnomah

2.9

3.2

3.1

2.9

2.9

3.0

2.7

2.5

2.9

2.8

3.1

3.2

Polk

0.3

0.2

0.3

0.3

0.2

0.3

0.3

0.2

0.3

0.3

0.3

0.2

Sherman

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Tillamook

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

Umatilla

0.3

0.2

0.3

0.2

0.2

0.2

0.2

0.1

0.2

0.2

0.2

0.2

Union

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Wallowa

0.1

0.1

0.0

0.0

0.1

0.0

0.0

0.1

0.0

0.0

0.1

0.0

Wasco

0.2

0.2

0.2

0.1

0.2

0.2

0.1

0.1

0.2

0.2

0.2

0.2

Washington

1.9

1.8

1.8

1.8

1.6

1.6

1.5

1.5

1.6

1.6

1.8

1.9

Wheeler

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Yamhill

0.5

0.5

0.5

0.5

0.5

0.4

0.4

0.4

0.5

0.4

0.6

0.5

 

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Graph 1:  Average daily number of hospitalizations in Oregon, averaged from 2000 to 2006, by month

 

 

 

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