Epidemiology is concerned with the frequency and pattern of health events in a population. FORMULAE USED TO COMPUTE THE MEASUREMENTS The following formulae are based on this typical epi 2 x 2 table with standard notation: Outcome (Disease) Yes No Yes a b a + b No c d c + d Exposure a + c b + d Other notation used: I o = Incidence of outcome among the unexposed (baseline risk) I e = Incidence of outcome among the exposed I To set policy and plan programs, public health officials must assess the health of the population theyserve and must determine whether health services are available, accessible, effective and efficient. The RR is a relative measure of two rates The essence of epidemiology is to measure disease occurrence and make comparisons between population groups. The current section introduces the commonly used measures that help our understanding of the distribution of disease in a given population. Please now read the resource text below. Basic Epidemiology (PDF 226P) This note covers the following topics: What is epidemiology, Measuring health and disease, Basic biostatistics: concepts and tools, Causation in epidemiology, Epidemiology and prevention: chronic noncommunicable diseases, Types of studies, Communicable diseases: epidemiology surveillance and response, Clinical epidemiology, Environmental and … Ratios are common descriptive measures, used in all fields. We can use epidemiology to determine the extent of disease in a population. The word epidemiology is derived from Greek and its literal interpretation is ‘studies upon people’. Incidence measures are central to the study of causal mechanisms with regard to how exposures affect health outcomes. For example, in a class of veterinary students in which 88 are female and 14 are male, the sex ratio of female students to male students is 88/14, or 6.3 to 1. Part 2 Describe basic summary measures of location and dispersion > Lecture 4: Tables and Graphs (Diener-West) Utilize appropriate methods of displaying data in tables and graphs Measuring Disease Occurrence: Prevalence. "Precise" means sharply defined or measured. The values of X and Y are determined during the same time interval. Ratios, and. Incidence: It is number of NEW cases occurring in a defined population during a specified period of time. Student learns to propose research questions and hypotheses, review the literature, and use basic epidemiology and statistical techniques to answer the research questions posed. First, the occurrence of disease is not random (i.e., various factors influence the likelihood of developing disease). The frequency distribution is a table which displays how many people fall into each category of a variable … As a descriptive measure, ratios can describe the male-to-female ratio of participants in a study, or the ratio of controls to cases (e.g., two controls per case). Epidemiology: a tool for the assessment of risk Ursula J. Blumenthal, Jay M. Fleisher, Steve A. Esrey and Anne Peasey The purpose of this chapter is to introduce and demonstrate the use of a key tool for the assessment of risk. Introduction to Epidemiology Part 2, start with slide 7. Epidemiology is a scientific method of problem-solving. The study of disease occurrence is called epidemiology. Death, disease, Delivery, Distribution, Determinants, Demographic variables and Disability. We will also look at measures of risk and their use and limitations in considering causal relationships. Source : http://hkmu.online/wp-content/uploads/2016/11/Epidemiological-disease-measurements-Copy.pptx A disease is called endemic if it persists in a population. epidemiology. Epidemiological Disease Measurements PPT. Differentiate between types of random variables and different measurement scales . There are two broad types of epidemiological studies: 1. scriptive variables and then explores how they are used in descriptive epidemiologic studies. Distribution. ! Measurements: Is the science of calculations. Understanding Analytic principles, Part 1. Define and measure health and illness events in communities. There are three basic measures of disease frequency used in epidemiology: prevalence, cumulative incidence and incidence density. Interpreting measures of relative risk (RR) A relative risk of 1.0 - indicates that the incidence of … View and Download PowerPoint Presentations on Measurement In Epidemiology PPT. Measurements of disease frequency: Prevalence is the most frequently used measure of disease frequency and is defined as: Number of existing cases of a disease Mortality, morbidity, disability, natality. Finally, measurement. The basic measures are the rate difference (RD) and rate ratio (RR). Here’s the outline of Chapter 3: 3.1 Measures of Disease Frequency. Table 4-1 lists the terms related to descriptive epidemiology and subcategories of vari-ables that make up person, place, and time. The “demi” in epidemiology The first blog in the series was Epidemiology-1. By the end of this 45-minute module you should be able: • To define risk as it is used in public health practice Prevalence: is the proportion (denoted as p) of a specific population having a particular disease. Intervention studies: Clinical Trials. World's Best PowerPoint Templates - CrystalGraphics offers more PowerPoint templates than anyone else in the world, with over 4 million to choose from. When measuring the rate of new occurrences of a disease, incidence is the appropriate measure. Through public health surveillance, a health systematically collects,analyzes, interprets and disseminates health data on an ongoing basis. It would be precise but … Formula of Incidence: (no.of NEW cases in a defined population during a specified time period )/(Population at risk … Human diseases have causal and preventive factors. The descriptive epidemiology study is noted by the collection of events over a defined population base and by the use of denominator data to determine rates. is commonly used in epidemiology because it most. 2.  Mortality.  Morbidity.  Disability.  Presence & absence or distribution of..  Medical needs.  Utilization of health services.  Demographic variables. 3. Rate Ratio Proportion 4.  Measures the occurrence of an event or disease in a given population during a given period (one Year). Presentation Summary : Quantitative measurements cont. The basic requirements. Lesson 2: Frequency Measures Used in Epidemiology Lesson 2 Frequency Measures Used in Epidemiology Epidemiologists use a variety of methods to summarize data. One fundamental method is the frequency distribution. Studying populations – basic demography Some basic concepts and techniques from demography - population growth, population characteristics, measures of mortality and fertility, life tables, cohort effects. Measurements in epidemiology Disease Disease frequency. frequency.  Mortality.  Morbidity. Rate Ratio Proportion  Measures the occurrence of an event or disease in a given population during a given period (one Year). (Birth rate, growth rate, accident rate)  Usually expressed per 100 or per1000 population.  A fraction is made up of 2 numbers. Our new CrystalGraphics Chart and Diagram Slides for PowerPoint is a collection of over 1000 impressively designed data-driven chart and editable diagram s guaranteed to impress any audience. Materials Included. Epidemiology is an information science Epidemiology is an information science: Data generated by epidemiologists is to be used for decision making. Assess the quality and relevance of data used to describe community health and illness. p is a number between 0 and 1. Measurements are important in day to day life in relation to seven Ds i.e. We can use it to study the natural history and prognosis of a disease or illness. Concepts and basic methods for deriving measures that are comparable across populations that differ in age and other demographic variables. Observational studies – we do not interfere in the process of the disease, but simply observe the disease and the associated factors. Student instructions handout Cdc … At the IJE, we have decided to attract a new type of paper—‘Methods of measurement in epidemiology’—with the aim of helping population health scientists to make informed decisions about the best measurement tools to use in different contexts and to understand the impact of using any one measurement tool. Epidemiologic Measures Measures of disease frequency Measures of association (“Measures of Effect”) 1 Incidence Proportion (Risk, … Epidemiology Key Terms and Core Concepts • Control: Epidemiology is used in two ways: 1) As an analytical tool for studying diseases and their determinants, and 2) To guide public health decision-making by developing and evaluating interventions that control and prevent health problems. Winner of the Standing Ovation Award for “Best PowerPoint Templates” from Presentations Magazine. Rate . The information is used when planning how to controland prevent disease in the community. We can use epidemiology to evaluate existing or new preventive and therapeutic measures. FORMULAS FROM EPIDEMIOLOGY KEPT SIMPLE (3e) Chapter 3: Epidemiologic Measures Basic epidemiologic measures used to quantify: • frequency of occurrence • the effect of an exposure • the potential impact of an intervention. Start with slide 5, most of this is a summary of biostatistics that you should have learned earlier and is a good review before you start the course. Epidemiologists are always mindful of . Epidemiologic measures are used to quantify the frequency of diseases in a population, measure the association between exposures and diseases, and address the potential impact of an intervention. 2/16/2004, 10/14/2004, 8/28/2007 3. 2. Find PowerPoint Presentations and Slides using the power of XPowerPoint.com, find free presentations research about Measurement In Epidemiology PPT The terms covered in this section are incidence, incidence rate, cumulative incidence, incidence density, and attack rate. By know… Most important slides in this set on numbers 8, 16, 28, 29, 34-38. More in-depth discussion can be obtained in texts of biostatistics. Scope of Measurements : Basic measurements of epidimology: 1. 2. 19 Basic Epidemiological assumptions 1.Human diseases doesnt occur at random or by chance 2. ! NNT/NNH : if you treat all 100 people you prevent the 5 cases of disease so you need to treat x=NNT to prevent 1 case of disease apply 3 simple rule: NNT= 1x100/5=20 meaning you need to treat 20 people in order to prevent 1 case of disease. Experimental studies – deliberate intervention is made and the effect of such intervention is observed. The RD is a measure of the absolute difference between two rates (e.g., incidence rate of cardiovascular disease for the exposed minus the incidence rate for the unexposed in a cohort study). Epidemiology is purposive: methods and knowledge are to be used for the ultimate purpose of prevention of disease, disability and death Epidemiology is under public scrutiny. Chart and Diagram Slides for PowerPoint - Beautifully designed chart and diagram s for PowerPoint with visually stunning graphics and animation effects. Studying populations - basic demography - 31 rev. Epidemiology is a scientific discipline, sometimes called “the basic science of public health.” It has, at its foundation, sound methods of scientific inquiry. Case fatality is used to describe the natural history of a disease and corresponds to the proportion of affected persons who die from that illness. use epidemiology to identify risk factors for disease, as well as identify the cause or etiology. BSCI 425 — EPIDEMIOLOGY & PUBLIC HEALTH Lecture Summaries Lectures in PowerPoint Format Lecture 1 — Introduction, Part I (Revised 2007) Lecture 2 — Introduction, Part II (Revised 2007) Lecture 2a — History of Epidemiology & Public Health (Revised 2007) Lecture 3 — Disease Transmission (Revised 2007) Lecture 4 — Measures of Morbidity (Revised 2007) Epidemiology - Epidemiology - Basic concepts and tools: Epidemiology is based on two fundamental assumptions. The basic tools of measurement in epidemiology are: Rates. Basic epidemiology starts with a definition of epidemiology, introduces the his-tory of modern epidemiology, and provides examples of the uses and applications of epidemiology. •Identify basic epidemiologic study designs and their frequent sequence of study ... –Seeks to measure the frequency of disease and/or collect descriptive data on risk factors ... can be used to identify which patients require antibiotics to recover. Epidemiologyprovides data for directing public health action. The ecologic study is a hypothesis generating study. Professor lesson plan Cdc-word [DOC-44KB]. the three most basic epidemiological models for microparasitic infections. Organize, group, and summarize data using exploratory data analysis techniques . It is the tendency of test measurement to center around the true value. A fundamental aspect of epidemiology is to quantify or measure the occurrence of illness in a population. Virtually every large population is heterogeneous in regard to sociodemographic (e.g., age, gender, education, religion), geographic, The most frequent information generated from these designs are incidence rates for injuries. Overview . An epidemic is an unusually large, short term outbreak of a disease. of measurements are validity, readability, accuracy, sensitivity, and specificity. Generally, Epidemiology answers six major questions: how many, who, where, when, how and why? The … errors are unavoidable, no matter where and by whom measurements are taken. Consider the example of a descriptive epidemiologic study of children who were exclusively breastfed.The practice Tools of measurement. Critically review and interpret basic epidemiological texts. Second, the study of populations enables the identification of the causes and preventive factors associated with disease. Frequency Measures Used in Epidemiology Epidemiologists use a variety of methods to summarize data. Data can be very precise, but inaccurate. In fact, in epidemiology, the term ratio is applied when the numerator is not a subset of the denominator. Lecture 2: Measuring Disease Occurrence (Morbidity and Mortality): Prevalence, incidence, incidence density Measuring Disease Occurrence: Prevalence. Accuracy is the extent to which a measurement reflects the true value. ! Apply descriptive epidemiology concepts and … They'll give your presentations a professional, memorable appearance - the kind of sophisticated look that today's audiences expect. They may also be used to assess other health outcomes in addition to diseases. The purpose of this manuscript is to review some of the basic statistical principles and formulas. Studies are conducted on human population 2. 20 Basic features of Epidemiology 1. population diversity. One fundamental method is the frequency distribution. In epidemiology, ratios are used as both descriptive measures and as analytic tools. Prevalence is used to describe the proportion of a population that is affected by a disease.

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