complete short community health worksheet leo
HCA 402: Skills Assessment #1: Calculating Case Rates
All case rates have two things in common, 1) A numerator or case count, and 2) a denominator (population). Calculating case rates isn’t rocket science, but obtaining accurate numbers to describe a populations’ health can be quite a challenge. So, let’s start with a case with available numbers.
A grade school asthma study was performed at Dolphin View Elementary. There were 120 asthma cases in a school population of 1,500. During the calendar year 2011, of the 120 cases total, 20 cases were newly diagnosed. There was 1 death during the year studies due to acute status asthmaticus.
- Calculate the disease prevalence, disease incidence and mortality rate for the school.
- How may the school administration and public health epidemiologists use this information to monitor and improve the health of Dolphin View Elementary students and its community at large?
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Dolphin View Elementary Asthma Study: (Illustrative) Meyer (2012) |
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Epidemiology Case Counts = 120 |
Population = 1,500 |
New Cases = 20 |
Deaths = 1 |
Time Period CY 2011 |
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The quantitative existence of the disease in the population |
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Prevalence Rate = |
number of diseased people at a point in time/ |
cases |
_______ |
x 1,000 = |
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number of individuals in the population |
population |
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______Cases per 1,000 |
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The speed of new cases of a disease in the population |
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Incidence Rate = |
number of new cases during the set time period/ |
cases |
_______ |
x 1,000 = |
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number of individuals in the population |
population |
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______Cases per 1,000 |
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Mortality Rate = |
number of new deaths of the disease in the period/ |
Case(s) |
_______ |
x 1,000 = |
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sum of risk period for all individuals |
population |
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______Cases per 1,000 |
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