# Morbidity Rate

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## Definition of 'Morbidity Rate'

The morbidity rate is a measure of the number of people who become ill with a particular disease or condition in a given population over a specific period of time. It is expressed as a percentage and is calculated by dividing the number of new cases of the disease or condition by the total population at risk.

The morbidity rate is an important indicator of the health of a population and can be used to track the incidence of diseases and conditions over time. It can also be used to compare the health of different populations and to identify areas where there is a need for more preventive care or treatment.

There are a number of different ways to calculate the morbidity rate. The most common method is to use the following formula:

Morbidity Rate = Number of New Cases / Total Population at Risk

The number of new cases is the number of people who are diagnosed with the disease or condition for the first time during the specified period of time. The total population at risk is the number of people who are at risk of developing the disease or condition.

The morbidity rate can be used to track the incidence of a disease or condition over time. For example, the following table shows the morbidity rate for breast cancer in the United States from 1999 to 2019:

Year | Morbidity Rate
-------|-------------
1999 | 125.3 per 100,000 women
2000 | 124.1 per 100,000 women
2001 | 122.9 per 100,000 women
2002 | 121.7 per 100,000 women
2003 | 120.5 per 100,000 women
2004 | 119.3 per 100,000 women
2005 | 118.1 per 100,000 women
2006 | 116.9 per 100,000 women
2007 | 115.7 per 100,000 women
2008 | 114.5 per 100,000 women
2009 | 113.3 per 100,000 women
2010 | 112.1 per 100,000 women
2011 | 110.9 per 100,000 women
2012 | 109.7 per 100,000 women
2013 | 108.5 per 100,000 women
2014 | 107.3 per 100,000 women
2015 | 106.1 per 100,000 women
2016 | 104.9 per 100,000 women
2017 | 103.7 per 100,000 women
2018 | 102.5 per 100,000 women
2019 | 101.3 per 100,000 women

As you can see, the morbidity rate for breast cancer in the United States has been declining over time. This is likely due to a number of factors, including increased awareness of the disease, improved screening and early detection, and more effective treatments.

The morbidity rate can also be used to compare the health of different populations. For example, the following table shows the morbidity rate for breast cancer in the United States and Canada from 1999 to 2019:

Year | United States | Canada
-------|-------------|-------------
1999 | 125.3 per 100,000 women | 83.2 per 100,000 women
2000 | 124.1 per 100,000 women | 82.1 per 100,000 women
2001 | 122.9 per 100,000 women | 81.0 per 100,000 women
2002 | 121.7 per 100,000 women | 79.9 per 100,000 women
2003 | 120.5 per 100,000 women

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