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Epidemiology vs. Biostatistics: Their Role in Public Health

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A variety of factors cause illnesses. What makes some individuals ill while others stay healthy? Which diseases are the most common in a specific city, state, or neighborhood, or among a specific demographic?


Each of these concerns is crucial in public health, which aims to improve the general physical health and well-being of entire communities. Public health specialists rely on the scientific disciplines of epidemiology and biostatistics consulting firms to assist them in answering these questions and, eventually, improving health outcomes.


These disciplines are separate, even though they overlap in certain ways. The parallels and contrasts between epidemiology and biostatistics will be discussed in this article and the responsibilities that both disciplines play in public health promotion.


Although both subjects are connected, biostatistics and epidemiology are not the same. Biostatistics, often known as biometry, is a branch of statistics that analyses biological phenomena using statistical modeling, techniques, and procedures. For example, a biostatistician could create a biological experiment, then collect and analyze the results.

Many epidemiological studies rely on biostatistics as a foundation. In other words, epidemiologists recurrently employ statistical concepts and procedures to arrive at mathematical conclusions regarding population health problems based on data.


What Does Biostatistics Have to Do With Public Health?


Biostatistics has been utilized to enhance public health outcomes since the beginning. Several case studies are examined by biostatistics services here.


Studying Cancer


Biostatisticians have long been involved in oncology, helping design trials to learn more about how and why malignancies develop and how they might be treated efficiently. Biostatistical research encompasses a wide spectrum of clinical studies in cancer, including patient populations of various sizes and treatment phases. Researchers have gained a better knowledge of the genetic markers using biostatistics services that determine whether or not a person is at risk for certain sorts of cancer due to these experiments.


Public Health Effects on the Environment


In addition, biostatisticians operating in public health have performed significant research into how air pollution, water contamination, and other environmental conditions may affect the health of a local community. For example, biostatisticians have unearthed crucial information on the functionality of toxic substances and harmful waste in different populations, identified links between local infrastructure and population health, and even determined the effects of climate change on different communities, thanks to surveys, clinical trials, and field observation.


Genetics Statistic


Statistical genetics is an important sub-discipline of biostatistics. To derive conclusions based on genetic data, statistical geneticists employ a variety of statistical approaches and biostatistics services. Statistical genetics elucidates how various genes interact in the following ways:

  • Affect certain illnesses or health problems.
  • Influence a phenotype that is considered “normal.”


Within specific populations, they’ve developed and adapted. The conclusions can assist physicians in identifying individuals who are at a higher risk for certain diseases, allowing for preventive therapy.


Development of the Human Being 


Biostatistical research has also established benchmarks and reference points for normal human development and growth. Researchers have better grasped how children and adolescents grow by surveying growth trends across large sample sizes. They have learned which variables promote healthy growth and which factors may impede it.



The study of disease in groups is known as epidemiology. For disease monitoring, outbreak investigation, and observational research, veterinarians and others in the preventive medicine and public health professions employ epidemiological approaches. These risk indicators are used to guide future research and disease prevention efforts. The use of hazard analysis critical control point (HACCP) systems relies heavily on epidemiological research data. Disease surveillance uses epidemiological methodologies to determine the most significant risks. Epidemiological research is also utilized to identify risk variables that might be crucial control points in the food supply system.


What Does Epidemiology Have to Do With Public Health?


Many instances of epidemiologists’ contributions to public health, disease control, and the development of measures to combat prevalent diseases can be found throughout history.


Diseases spread by food and water


Epidemiologists have done important work linking illness outbreaks to environmental factors such as pollution in local food and water supplies.

  • Thanks to epidemiologists, we know that typhoid fever is linked to inadequate sanitation and contaminated water. This information is essential for identifying high-risk locations and avoiding typhoid outbreaks.
  • Cholera is caused by toxins contained in feces, which can spread to food and water supplies due to a lack of sanitation and hygiene.


Infections that are caused by viruses


Infectious disease epidemiologists have made significant contributions. For example, consider the following three illustrations:


  • According to the CDC, researchers were essential in determining the genetic makeup of 1918 influenza. That knowledge helped epidemiologists better plan for future illness outbreaks.
  • Epidemiology has also offered a worldwide perspective of the HIV issue, assisting researchers in identifying trends, patterns, “hot spots,” and disease management strategies. The World Health Organization (WHO) summarizes this research in-depth.
  • Epidemiologists have been working hard recently to figure out what caused COVID-19 and how to stop it from spreading. The CDC documents this effort regularly.


How Do Epidemiology and Biostatistics Varies?


Biostatistics and epidemiology are frequently seen to be intertwined disciplines. This is because both areas are concerned with population health and have the same end aim of enhancing general health and illness prevention in a particular community.


An epidemiologist can utilize biostatistics services to assist, analyze data and draw reasonable judgments.


Despite their similarities, epidemiology and biostatistics have a few key differences:

  • Pathogens and epidemics are often the focus of epidemiologists interested in particular health-related phenomena. On the other hand, biostatistics consulting firms are interested in wider biological concerns like genetics.
  • Epidemiologists often focus on illness causes and the many elements contributing to community health issues. On the other hand, biostatisticians are experts in the impacts of health concerns such as heredity, the environment, and biological variables.
  • Epidemiologists can participate in community outreach activities, which need excellent teaching abilities. However, the job definition of a biostatistician does not normally include public education to a large extent.
  • Biostatistician jobs, much more than epidemiological jobs, often need biostatistics consulting services to advance computer skills and project management abilities.

Health data is full of useful information that can help save lives. Biostatistics, which entails utilizing statistics to evaluate health data, is crucial in educating and supporting public health actions, particularly during national health emergencies. Biostatisticians dedicated to defending the health of local, national, and global populations will significantly impact the future of public health.


 Read More: 

What Exactly is Biostatistics

What Is the Difference Between Clinical Trial & Clinical Research

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