| Hospital Specific Reports |
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| Heart Bypass Surgery (CABG) |
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Oregon 2004
| What is Heart Bypass Surgery (CABG)?* |
Coronary artery bypass graft (CABG) surgery creates new routes around a portion of an artery that has been narrowed or blocked by plaque buildup (atherosclerosis). The blocked portion of the artery is bypassed using a blood vessel taken from elsewhere in the body (usually the chest or leg). Blood is redirected through the new blood vessel, restoring blood flow to the affected portion of the heart muscle. Coronary artery bypass surgery is a common treatment for coronary artery disease.
See Healthwise for additional information on CABG – Coronary Artery Disease or CABG – Heart Attack.
*Adapted with permission from Healthwise® Knowledgebase, © 1995-2005 Healthwise, Incorporated, P.O. Box 1989, Boise, Idaho 83701. ALL RIGHTS RESERVED
| What do these indicators mean? |
Volume. The number of patients who had a coronary artery bypass graft (CABG) is displayed as the volume. CABG is highly specialized, and staff at hospitals that perform more of these surgeries may be more familiar with possible complications that can occur. Therefore, performing more of these surgeries may lead to better outcomes. Volume is not a direct measure of the quality of care, but is useful in gauging how much experience a particular hospital has for this procedure.
Research indicates that performing at least 200 surgeries per year may lead to better patient outcomes. In Oregon, eleven hospitals performed at least one CABG in 2004, and seven hospitals performed 200 or more.
Death Rate. The CABG death rate is the percent of patients admitted for CABG who died in the hospital.
However, some patients are sicker or more difficult to treat, and some hospitals admit more of these complex patients than others. Each hospital’s death rate is adjusted to help account for differences in these factors, but keep in mind that the adjustment is not perfect. The adjusted death rate is presented in the displays that follow.
The average death rate for CABG in the United States was 2.9% in 2002. In Oregon, the death rate was 3.4% in 2004. This report uses the statewide average as the reference rate.
Horizontal lines are displayed with each hospital rate. These lines represent the amount of random variation or “noise” in the data. If the gray line crosses the state average, the hospital rate is “within the margin of error” and therefore not statistically different than the state average for this procedure. The margin of error is wider for hospitals with fewer CABG patients.
| What do the symbols mean? |
The symbols on this chart tell you which differences are large enough to be considered “statistically significant,” or outside the “margin of error”. Statistical differences are based on the margin of errors described above.
- If a hospital’s rate is significantly lower than the state average, it gets a plus symbol
- If a hospital’s rate is significantly higher than the state average, it gets a cross symbol
- If a hospital’s rate is statistically neither higher nor lower than the state average (within the margin of error), no symbol is shown.
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| CABG Volume |
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Oregon 2004
Notes
- Hospitals not shown performed fewer than 5 of these procedures in 2004.
- Applies to adults 40 years of age and older.
- Statewide Coronary Artery Bypass Graft (CABG) volume was 3,253 in 2004
- See Technical Documentation for more detail
- Hospitals that submitted additional information about their volume are listed below each graph; click on the hospital name to access their comments.
- The Agency for Healthcare Research and Quality indicates that performing more than 200 cases per year may lead to better outcomes.
The following hospitals have provided comments regarding these figures:
Hospitals not shown had fewer than 5 cases in the reporting year.
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The following hospitals have provided comments regarding these figures:
Hospitals not shown had fewer than 5 cases in the reporting year.
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The following hospitals have provided comments regarding these figures:
Hospitals not shown had fewer than 5 cases in the reporting year.
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The following hospitals have provided comments regarding these figures:
Hospitals not shown had fewer than 5 cases in the reporting year.
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| Heart Bypass Surgery (CABG) |
|
Oregon 2004
| What is Heart Bypass Surgery (CABG)?* |
Coronary artery bypass graft (CABG) surgery creates new routes around a portion of an artery that has been narrowed or blocked by plaque buildup (atherosclerosis). The blocked portion of the artery is bypassed using a blood vessel taken from elsewhere in the body (usually the chest or leg). Blood is redirected through the new blood vessel, restoring blood flow to the affected portion of the heart muscle. Coronary artery bypass surgery is a common treatment for coronary artery disease.
See Healthwise for additional information on CABG – Coronary Artery Disease or CABG – Heart Attack.
*Adapted with permission from Healthwise® Knowledgebase, © 1995-2005 Healthwise, Incorporated, P.O. Box 1989, Boise, Idaho 83701. ALL RIGHTS RESERVED
| What do these indicators mean? |
Volume. The number of patients who had a coronary artery bypass graft (CABG) is displayed as the volume. CABG is highly specialized, and staff at hospitals that perform more of these surgeries may be more familiar with possible complications that can occur. Therefore, performing more of these surgeries may lead to better outcomes. Volume is not a direct measure of the quality of care, but is useful in gauging how much experience a particular hospital has for this procedure.
Research indicates that performing at least 200 surgeries per year may lead to better patient outcomes. In Oregon, eleven hospitals performed at least one CABG in 2004, and seven hospitals performed 200 or more.
Death Rate. The CABG death rate is the percent of patients admitted for CABG who died in the hospital.
However, some patients are sicker or more difficult to treat, and some hospitals admit more of these complex patients than others. Each hospital’s death rate is adjusted to help account for differences in these factors, but keep in mind that the adjustment is not perfect. The adjusted death rate is presented in the displays that follow.
The average death rate for CABG in the United States was 2.9% in 2002. In Oregon, the death rate was 3.4% in 2004. This report uses the statewide average as the reference rate.
Horizontal lines are displayed with each hospital rate. These lines represent the amount of random variation or “noise” in the data. If the gray line crosses the state average, the hospital rate is “within the margin of error” and therefore not statistically different than the state average for this procedure. The margin of error is wider for hospitals with fewer CABG patients.
| What do the symbols mean? |
The symbols on this chart tell you which differences are large enough to be considered “statistically significant,” or outside the “margin of error”. Statistical differences are based on the margin of errors described above.
- If a hospital’s rate is significantly lower than the state average, it gets a plus symbol
- If a hospital’s rate is significantly higher than the state average, it gets a cross symbol
- If a hospital’s rate is statistically neither higher nor lower than the state average (within the margin of error), no symbol is shown.
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| CABG Death Rate |
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Oregon 2004
The symbols on this chart tell you which differences are outside the margin of error:
Lower than the state average
Higher than the state average
No symbol The hospital’s rate is within the margin of error and therefore not statistically different than the state average for this condition
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Additional Notes
- Number of CABG’s performed appear in parentheses. Hospitals not shown performed fewer than 30 of these procedures in 2004.
- Rates have been adjusted for age, sex, and risk of death
- Applies to adults 40 years and older.
- See Technical Documentation for more detail
- Hospitals that submitted additional information about their death rates are listed below each graph; click on the hospital name to access their comments.
- Lower rates may represent better quality.
The following hospitals have provided comments regarding these figures:
*National data source: National rate is from 2002 Nationwide Inpatient Sample (NIS).
Number of cases in parentheses. Hospitals not shown had fewer than 30 cases in the reporting year.
Horizontal lines represent the margin of error (based on 95% confidence intervals)
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The following hospitals have provided comments regarding these figures:
*National data source: National rate is from 2002 Nationwide Inpatient Sample (NIS).
Number of cases in parentheses. Hospitals not shown had fewer than 30 cases in the reporting year.
Horizontal lines represent the margin of error (based on 95% confidence intervals)
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The following hospitals have provided comments regarding these figures:
*National data source: National rate is from 2002 Nationwide Inpatient Sample (NIS).
Number of cases in parentheses. Hospitals not shown had fewer than 30 cases in the reporting year.
Horizontal lines represent the margin of error (based on 95% confidence intervals)
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The following hospitals have provided comments regarding these figures:
*National data source: National rate is from 2002 Nationwide Inpatient Sample (NIS).
Number of cases in parentheses. Hospitals not shown had fewer than 30 cases in the reporting year.
Horizontal lines represent the margin of error (based on 95% confidence intervals)
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