Topics
A to Z
Data &
 Statistics
Forms &
Publications
News &
Advisories
Licensing &
Certification
Rules &
Regulations
Public Health
Directory
Print this Article   Bookmark and Share
Oregon EPHT Asthma Hospitalizations Indicator

Asthma Indicator:  Hospitalizations

Measure: Age-adjusted annual hospitalization rates

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.

Tracking asthma hospitalizations will let Oregon EPHT look more closely at the relationship between asthma and indoor and outdoor pollutants by examining trends, geographic or demographic differences, and targeting interventions to those most in need of care. EPHT can also assist in monitoring the burden of asthma, asthma trends and how asthma affects the quality of life.

Age-adjusted rates represent the number of hospitalizations per 10,000 people that would be expected if the state or county population had the same age structure as the United States had in 2000. Crude and age-adjusted rates for Oregon are very similar.

Between 2000 and 2006, the asthma hospitalization rate was 6 to 7 per 10,000. This is significantly lower than the asthma hospitalization rate for the United States, which was 17 per 10,000 in 2004. It is also slightly lower than the rates in neighboring West Coast states, such as Washington and California.

The significantly lower asthma hospitalization rate in Oregon, when compared to the United States, cannot be attributed to differences in asthma prevalence because the percentage of adults and children who ever had asthma was actually somewhat higher in Oregon than in the United States. This suggests that the lower asthma hospitalization rate in Oregon may have been due to less severe forms of asthma or better asthma management in Oregon compared to other parts of the United States.

The table, graphs and map below show that asthma hospitalization rates varied among counties, with the average annual rate ranging from 3 per 10,000 in Hood River to 17 per 10,000 in Harney County. However, it is important to note that rate estimates for many counties can be based on a relatively small number of hospitalizations, resulting in unstable estimates. In the tables and graphs, rates based on less than 10 hospitalizations are flagged with an asterisk.

 

Table 1:  Age-adjusted annual asthma hospitalization rates, by year and county

Graph 1:  Age-adjusted annual asthma hospitalization rate for Oregon, by year from 2000 to 2006

Graph 2:  Age-adjusted annual asthma hospitalization rates by county, averaged from 2000 to 2006

Map 1:  Age-adjusted annual asthma hospitalization rates for Oregon counties

  


Table 1:    Age-adjusted annual asthma hospitalization rates from 2000 to 2006, by year and county. Rates based on less than 10 events are unstable and marked with an asterisk (*).

 

 

2000

 

2001

 

2002

 

2003

 

2004

 

2005

 

2006

 

                           

Oregon

6.6

 

6.5

 

7.2

 

6.9

 

6.0

 

6.7

 

5.9

 

                             

Baker

6.8

 

3.3

*

3.7

*

6.6

 

2.6

*

5.6

*

2.7

*

Benton

2.9

 

3.5

 

3.0

 

3.4

 

4.1

 

2.6

 

3.7

 

Clackamas

5.0

 

4.6

 

6.1

 

5.0

 

4.2

 

4.6

 

3.9

 

Clatsop

10.7

 

9.2

 

10.0

 

8.4

 

8.1

 

9.6

 

8.0

 

Columbia

6.9

 

7.4

 

8.0

 

7.5

 

7.2

 

6.9

 

7.0

 

Coos

14.8

 

12.1

 

13.3

 

13.4

 

12.4

 

17.1

 

13.6

 

Crook

6.5

 

4.7

 

6.4

 

12.0

 

7.1

 

8.2

 

3.6

*

Curry

7.0

 

5.5

 

10.8

 

11.9

 

11.8

 

8.4

 

7.0

 

Deschutes

8.0

 

5.5

 

6.5

 

4.9

 

3.8

 

5.5

 

4.0

 

Douglas

11.2

 

11.2

 

14.5

 

12.8

 

10.3

 

10.0

 

8.6

 

Gilliam

10.9

*

22.8

*

0.0

*

7.8

*

0.0

*

19.0

*

3.3

*

Grant

0.9

*

4.5

*

2.5

*

6.6

*

9.5

*

5.4

*

3.2

*

Harney

6.3

*

25.4

 

34.8

 

30.2

 

6.7

*

9.4

*

8.0

*

Hood River

6.7

 

1.8

*

1.0

*

5.8

 

2.5

*

2.5

*

1.8

*

Jackson

6.3

 

7.1

 

7.0

 

9.6

 

6.8

 

9.4

 

7.8

 

Jefferson

11.0

 

13.5

 

12.5

 

11.7

 

11.7

 

7.9

 

6.5

 

Josephine

6.7

 

6.7

 

9.0

 

10.0

 

7.1

 

8.9

 

5.7

 

Klamath

7.3

 

7.4

 

9.0

 

8.1

 

9.6

 

10.1

 

6.7

 

Lake

10.8

*

18.8

 

11.0

*

14.5

 

11.3

*

6.6

*

7.3

*

Lane

4.8

 

5.5

 

6.5

 

5.5

 

6.2

 

6.2

 

6.0

 

Lincoln

6.3

 

8.6

 

4.6

 

4.9

 

8.6

 

7.6

 

5.3

 

Linn

12.1

 

10.4

 

8.5

 

8.0

 

7.1

 

7.6

 

7.4

 

Malheur

3.1

 

2.1

*

3.4

 

5.4

 

6.3

 

3.2

 

2.9

 

Marion

4.2

 

4.2

 

4.6

 

5.4

 

4.4

 

5.2

 

5.1

 

Morrow

7.1

*

8.6

 

9.7

 

8.3

*

6.8

*

1.5

*

1.2

*

Multnomah

8.3

 

8.1

 

8.4

 

7.5

 

6.8

 

8.0

 

7.8

 

Polk

2.5

 

2.7

 

3.0

 

5.5

 

2.4

 

4.1

 

4.3

 

Sherman

0.0

*

15.5

*

15.2

*

28.3

*

35.5

*

11.5

*

7.8

*

Tillamook

12.0

 

15.0

 

9.8

 

5.9

 

4.8

 

4.8

 

3.2

*

Umatilla

4.6

 

7.2

 

8.8

 

7.0

 

3.6

 

2.7

 

3.1

 

Union

9.1

 

7.5

 

6.5

 

15.9

 

12.2

 

3.9

*

4.9

 

Wallowa

4.2

*

4.8

*

10.9

*

8.8

*

5.9

*

7.7

*

6.5

*

Wasco

8.0

 

7.9

 

7.9

 

10.7

 

10.2

 

9.5

 

16.7

 

Washington

6.0

 

5.0

 

5.6

 

4.8

 

4.2

 

5.5

 

4.4

 

Wheeler

9.5

*

9.4

*

7.5

*

24.6

*

0.0

*

0.0

*

0.0

*

Yamhill

6.5

 

5.9

 

9.6

 

7.3

 

6.7

 

5.9

 

5.0

 


Graph 1:  Age-adjusted annual asthma hospitalization rate for Oregon, by year from 2000 to 2006.

 


Graph 2:  Age-adjusted annual asthma hospitalization rates by county, averaged from 2000 to 2006, shown as differences from the Oregon average annual rate for the same time period. Error bars indicate 95% confidence intervals. Counties for which the confidence interval does not include the Oregon average, are statistically significantly different from the Oregon rate.

 

  


Map 1:  Age-adjusted  annual asthma hospitalization rates for Oregon counties, shown in three statistical categories: higher than, similar to, or lower than the Oregon rate. Data are summarized for 2000 to 2006. Statistical significance was determined by comparing the 95% confidence interval of the county rate with the State rate.

 

 

  

Return to asthma hospitalization indicator homepage.