Part
01
of five
Part
01
Congestive Heart Failure - Patient Volume
We researched the number of patients diagnosed annually with Congestive Heart Failure in the US and provided a breakdown of CHF diagnoses per state according to each stage of CHF. To determine patient volume, our findings required many calculations and several triangulations. For each triangulation and calculation that we made, we have provided an explanation for how we arrived at our conclusion. The final result of our findings has been compiled into a spreadsheet.
Congestive Heart Failure in the United States
According to the Centers for Disease Control, about 5.7 million Americans suffer from heart failure. Each year in the US approximately 550,000 individuals are diagnosed with Congestive Heart Failure. About 75% to 80% of the victims of heart failure are above the age of 65. Every year in the US about 1 million people are admitted to hospitals with Congestive Heart Failure. Of those hospitalized, about 30% to 60% are "readmits." Deaths from Congestive Heart Failure in the US have increased by 35% in the past 25 years. The most recent data shows that about 53,000 Americans die each year from Congestive Heart Failure.
Stages of heart Failure
Stage A is a classification for individuals who are typically asymptomatic and at risk for heart failure. This is commonly "considered pre-heart failure." Since this stage does not cause any symptoms, and since there are no physical abnormalities at this stage, quantitative data is difficult to obtain. For this reason, despite searching extensively through medical journals, government databases, and reputable media sources, we could not determine how prevalent this stage of heart failure is.
Stage B is a classification for individuals that are also typically asymptomatic and at risk for developing heart failure. This stage is commonly "considered pre-heart failure." These types of individuals may have been previously diagnosed with other complicating heart conditions such as "systolic left ventricular dysfunction." According to the most recent population based study of the prevalence of each of the stages of heart disease in 2006, 21.4% of those diagnosed with heart disease experienced "asymptomatic cardiac structural or functional abnormalities." While our source does not explicitly state that these individuals were Stage B, the aforementioned medical definition of this stage indicates that these individuals could be classified as Stage B. Using this data, we calculated that the total number of people diagnosed with Stage B Congestive Heart Failure in the US each year is 117,700 by multiplying the 21.4% that were Stage B by the 550,000 total diagnosed with CHF. Please note that our research found a lack of recent population based studies on the prevalence of each of the individual stages of heart failure despite searching extensively through medical journals, government databases, and reputable media sources.
Stage C is a classification for individuals who are diagnosed with heart failure and are experiencing symptoms such as "shortness of breath," fatigue, and difficulty exercising and doing daily tasks. According to the most recent population based study of the prevalence of each of the stages of heart disease in 2006, 7.2% of those diagnosed with heart disease are in Stage C. Using this data, we calculated that the total number of people diagnosed with Stage C Congestive Heart Failure in the US each year is 39,600 by multiplying the 7.2% that were Stage C by the 550,000 total diagnosed with CHF. Please note that our research found a lack of recent population based studies on the prevalence of each of the individual stages of heart failure despite searching extensively through medical journals, government databases, and reputable media sources.
Stage D is a classification for individuals who are diagnosed with advanced heart failure, experience severe symptoms, and do not respond to treatment. Stage D is the final and most severe stage of heart failure. According to the American Heart Association, about 10% of all patients diagnosed with Congestive Heart Failure are Stage D. We calculated that the total number of people in the US diagnosed with Stage D Congestive Heart Failure each year was 55,000 by multiplying the 10% that were diagnosed with Stage D by the 550,000 total that were diagnosed with CHF.
It is important to note that our research found a lack of recent population based studies on the prevalence of each of the individual stages of heart failure despite searching extensively through medical journals, government databases, and reputable media sources. In other words, determining what recent percentages of the US population suffer from which stage of heart failure is difficult. There is currently a need for a large study of the US population that focuses on the prevalence of each of the stages of heart failure.
limitations
As mentioned, we uncovered a dearth of recent population based studies on the prevalence of the specific stages of heart failure despite searching extensively through medical journals, government databases, and reputable media sources. In other words, determining what recent percentages of the US population suffer from which stage of heart failure is difficult. There is currently a need for a large study of the US population that focuses on the prevalence of each of the stages of heart failure.
Also, the diagnosis of individuals with early symptoms of heart failure is frequently delayed because some individuals commonly attribute symptoms such as tiredness to aging. In these cases, there may be a significant portion of the population which remains undiagnosed.
State by Stage breakdown | Calculations
Despite searching extensively through medical journals and government databases we could not find any data that directly indicated the number of CHF diagnoses per state. Even the CDC only provided information on deaths and hospitalizations. Therefore, we found it necessary to triangulate this information.
We were able to establish a mathematical relationship between the number of individuals diagnosed and the number of individuals that died from CHF. From our research we found that each year in the US there are about 53,000 deaths from Congestive Heart Failure. Since we already know that 550,000 people are diagnosed annually with CHF in the US each year, we calculated that the number of deaths is about 1/10 the number of diagnoses by dividing the total number of diagnoses (550,000) by the total number of deaths (53,000).
Using this mathematical relationship we were able to calculate the number of individuals diagnosed with CHF per state by multiplying the CDC prevalence rate by the state population by 10 (due to the aforementioned mathematical relationship.)
Since the calculations involved more than 50 data pulls from the US Census Bureau and the CDC, we created a calculations document which fully lists and details each calculation made.
To make the results of our research easier to read, our results have been organized into a spreadsheet.
Conclusion
We examined the patient volumes of those diagnosed annually with Congestive Heart Failure in the US and provided a breakdown of CHF diagnoses per state according to each stage of CHF. Our findings required multiple calculations and several triangulations. For each triangulation and calculation that we made, we have provided an explanation for how we arrived at our conclusion. The final result of our findings has been compiled into a spreadsheet.