Rate ratio epidemiology

    • [PDF File] Measurement in Epidemiology2015 - Mahidol University

      http://5y1.org/file/10883/measurement-in-epidemiology2015-mahidol-university.pdf

      If 15 men and 5 women develop influenza, The relative risk of developing influenza in men, as compared with women, is: Risk in men = 15/50 divided by Risk in women = 5/50. 15/50 : 5/50 = 3.0. The odds ratio is a ratio of two odds The odds in men = 15/35 divided by The odds in women = 5/35. 5 : 5/45 = 3.9.

      TAG: epidemiology myocardial infarction

    • [PDF File] EPI Case Study 1 Incidence, Prevalence, and Disease …

      http://5y1.org/file/10883/epi-case-study-1-incidence-prevalence-and-disease.pdf

      EPIDEMIOLOGY CASE STUDY 1: Incidence, Prevalence, and Disease Surveillance; Historical Trends in the Epidemiology of M. tuberculosis INSTRUCTOR’S GUIDE VERSION 1.0 Date Last Modified: November 16, 2009 6 Question 5 A. Which group has the highest incidence rate of TB in 2007? Answer Key

      TAG: epidemiology of cardiomyopathy

    • [PDF File] Text S2. Calculation of incidence rate ratios and 95% ... - LSHTM

      http://5y1.org/file/10883/text-s2-calculation-of-incidence-rate-ratios-and-95-lshtm.pdf

      However, the data necessary to calculate a rate ratio has been provided. In order to calculate the tuberculosis rate ratio for people with CD4 counts < 200 cells/µL we must use the incidence rates and their 95% confidence intervals. The incidence rate in people who started ART with baseline CD4 counts < 200 cells/µL

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    • [PDF File] An Overview of Measurements in Epidemiology V3 2007

      http://5y1.org/file/10883/an-overview-of-measurements-in-epidemiology-v3-2007.pdf

      AN OVERVIEW OF MEASUREMENTS IN EPIDEMIOLOGY [VER 3, 2007] ? Epidemiology is about identifying associations between exposures and outcomes. To identify any association, exposures and outcomes must first be measured in ... This formula for Rate Ratio is based on the following 2 x 2 table format: Cases (Outcome) Person-time …

      TAG: epidemiology of polio

    • [PDF File] Methods for estimating adjusted risk ratios - SAGE Journals

      http://5y1.org/file/10883/methods-for-estimating-adjusted-risk-ratios-sage-journals.pdf

      Options other than the Breslow method for dealing with tied survival times will produce risk-ratio estimates for exposure to a low estrogen-receptor–level tumor that are too large: 1) the efron option produces a risk ratio of 1.91, 2) the exactm option yields 2.04, and 3) the exactp option risk ratio is 2.49.

      TAG: epidemiology of poliomyelitis

    • [PDF File] Standardization of rates and ratios - epidemiolog

      http://5y1.org/file/10883/standardization-of-rates-and-ratios-epidemiolog.pdf

      Similarly, the SRR for each occupation relative to the standard population is 0.0031/0.0021 = 1.48, indicating a 48% higher age-standardized rate of death in each occupational population compared to the standard population. However, the apparent equivalence of the directly standardized rates is misleading.

      TAG: american journal of epidemiology author

    • [PDF File] Ratio, rate, or risk? - The Lancet

      http://5y1.org/file/10883/ratio-rate-or-risk-the-lancet.pdf

      Ratio, rate, or risk? In epidemiology, the terms ratio, rate, and risk have clear definitions. 1. In the emerging publications related to ... Ratio, rate, and risk have different meanings that are based on the variable being measured in the relevant study designs. It is hoped that

      TAG: american journal of epidemiology 2017

    • [PDF File] Epidemiologic Formulas and Terminology - San Jose State …

      http://5y1.org/file/10883/epidemiologic-formulas-and-terminology-san-jose-state.pdf

      The risk (or rate) ratio is the ratio of the two risks (or rates) For example, if the risk in the exposed group is 2 per 1000 and the risk in the non-exposed group is 1 per 1000, then the risk ratio is 2. The relative risk quantifies the effect of the exposure in relative terms, i.e., the relative strength of the effect.

      TAG: epidemiology research articles

    • [PDF File] Calculating incidence rates and prevalence proportions: not as …

      http://5y1.org/file/10883/calculating-incidence-rates-and-prevalence-proportions-not-as.pdf

      epidemiology [8]. Especially round the term ‘rate’ which is interchangeably used with the term proportion and some-times with the term ratio [ 8, 9]. As a consequence, the comparability of incidence rates and prevalence propor-tions between different sources is challenging. First, decisions are needed to establish the denominator.

      TAG: american journal of epidemiology rwe

    • [PDF File] Epidemiologic Measurements Used to Describe Disease …

      http://5y1.org/file/10883/epidemiologic-measurements-used-to-describe-disease.pdf

      death rate Rate Point prevalence Reference population Life expectancy Birth rate Ratio Prevalence Risk factor/population at risk Specific rate General fertility rate. FIGURE 3-1. Definitions of mathematical terms that are used in epidemiology. Modified with permission from Aragón T. Descriptive Epidemiology: Describing Findings and Generating ...

      TAG: ratio and rate problems examples

    • [PDF File] Measurement in Epidemiology2015 - Mahidol University

      http://5y1.org/file/10883/measurement-in-epidemiology2015-mahidol-university.pdf

      If 15 men and 5 women develop influenza, The relative risk of developing influenza in men, as compared with women, is: Risk in men = 15/50 divided by Risk in women = 5/50. 15/50 : 5/50 = 3.0. The odds ratio is a ratio of two odds The odds in men = 15/35 divided by The odds in women = 5/35. 5 : 5/45 = 3.9.

      TAG: rate ratio difference

    • [PDF File] Calculating Person Time - UNC Gillings School of Global …

      http://5y1.org/file/10883/calculating-person-time-unc-gillings-school-of-global.pdf

      investigator can calculate the rate of the health outcome or disease, or how quickly people are acquiring the health outcome or disease. Calculating rates ... 2013, and Epidemiology 718, Epidemiologic Analysis of Binary Data course lectures, 2009-2013. ERIC NOTEBOOK PAGE 3 Acknowledgement The authors of the Second Edition of the ERIC Notebook ...

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    • [PDF File] Epidemiology of PTSD - Veterans Affairs

      http://5y1.org/file/10883/epidemiology-of-ptsd-veterans-affairs.pdf

      Current past year PTSD prevalence was estimated at 3.5% (2).The lifetime prevalence of PTSD among men was 3.6% and among women was 9.7%. The twelve month prevalence was 1.8% among men and 5.2% among women (3). These findings are very similar to those of the first National Comorbidity Survey. The original survey was conducted in the early …

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    • [PDF File] Second Edition - UNC Gillings School of Global Public Health

      http://5y1.org/file/10883/second-edition-unc-gillings-school-of-global-public-health.pdf

      outcome. In epidemiology, the null value for a risk ratio or rate ratio is 1.0, and it is also 1.0 for odds ratios and prevalence ratios (terms you will come across). A risk ratio, rate ratio, odds ratio or prevalence ratio of 1.0 is obtained when, for a risk ratio for example, the risk of disease among the exposed is equal to the risk of disease

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    • [PDF File] epiR: Tools for the Analysis of Epidemiological Data

      http://5y1.org/file/10883/epir-tools-for-the-analysis-of-epidemiological-data.pdf

      the Mantel-Haenszel adjusted incidence rate ratio. ARate Wald confidence interval for the attributable rate for each strata. Wald confi-dence interval for the crude attributable rate. Wald confidence interval for the Mantel-Haenszel adjusted attributable rate. PARate Wald confidence interval for the population attributable rate for each strata.

      TAG: unit rate ratio worksheet

    • [PDF File] Chapter 3: Epidemiologic Measures (Overview) - San José …

      http://5y1.org/file/10883/chapter-3-epidemiologic-measures-overview-san-josé.pdf

      represent the rate or risk of disease in the non-exposed group. Absolute Measure of Association/Effect (Risk or Rate Difference) is captured in the rate or risk difference (RD) RD R R. 1 0. Relative Measure of Association/Effect (Risk or Rate Ratio) 0 1 R R RR Note: The relative effect of an exposure can also captured by the SMR (see section on ...

      TAG: lesson 7 homework practice ratio and rate problems

    • [PDF File] Measures of disease frequency - TeachEpi

      http://5y1.org/file/10883/measures-of-disease-frequency-teachepi.pdf

      Rate Describes how rapidly health events are occurring in a population of interest. In epidemiologic studies, we typically measure the average rate at which a disease is occurring over a period of time. Rate is always non-negative, but has no upper bound (0 < Rate < infinity) Rate is not a proportion bounded between 0 and 1 Example:

      TAG: epidemiology of myocardial infarction

    • [PDF File] Quiz (Key) on Chap 6 (Incidence & Prevalence) & Chap 8 …

      http://5y1.org/file/10883/quiz-key-on-chap-6-incidence-prevalence-chap-8.pdf

      It may be measured as a rate or a proportion. 2. A study starts with 5,000 people. Of these, 125 have the disease in question. What is the prevalence of disease per 1000 people? (Show work). SOLUTION: Prevalence per 1000 = 125 / 5000 × 1000 = 25 3. A study starts with 4,875 health people. (Think of these as the 5000 from problem 2 minus the ...

      TAG: epidemiology myocardial infarction

    • [PDF File] Measuring Risk in Epidemiology Transcript - Northwest …

      http://5y1.org/file/10883/measuring-risk-in-epidemiology-transcript-northwest.pdf

      Epidemiology.) An incidence rate is the number of new cases of illness occurring in a population over a specific period of time, usually a year, divided by the total population at risk. An attack rate is a specific form of an incidence rate, indicating the incidence of disease in a population during an epidemic or outbreak, usually less than a ...

      TAG: epidemiology of cardiomyopathy

    • [PDF File] Risk and Rate Measures in Cohort Studies - UNC Gillings …

      http://5y1.org/file/10883/risk-and-rate-measures-in-cohort-studies-unc-gillings.pdf

      c) Rate ratio = d) Rate difference= References Dr. Carl M. Shy, Epidemiology 160/600 Introduction to -2001, The University of North Carolina at Chapel Hill, Department of Epidemiology Rockhill B, Newman B, Weinberg C. Use and misuse of population attributable fractions. Am J Public Health. 1998 Jan;88(1):15-9. No abstract available.

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    • [PDF File] Exact Estimates for a Rate Ratio - JSTOR

      http://5y1.org/file/10883/exact-estimates-for-a-rate-ratio-jstor.pdf

      The incidence density ratio, or rate ratio, is a funda-mental measure of association in epidemiology.1 Several rate ratio estimators are available for follow-up data when the data have been arranged as a series of 2X2 tables with person-time denominators. These include a Mantel-Haenszel estimator, a weighted least squares

      TAG: epidemiology of polio

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