2 edition of Reliability and validity of proxy reported information in a case-control study of lung cancer. found in the catalog.
Reliability and validity of proxy reported information in a case-control study of lung cancer.
Gaylene Evelyn Pron
Written in English
|The Physical Object|
|Number of Pages||252|
While normal lung tissue is light pink in color, the tissue surrounding the cancer is black and airless, the result of a tarlike residue left by cigarette smoke. Lung cancer accounts for the largest percentage of cancer deaths in the United States, and cigarette smoking is directly responsible for . Validity means that you are actually measuring what you intend to measure. For example, if you wanted to measure stress and used blood pressure as a measure of stress, the validity of this measure would depend on how much BP is KNOWN to be related to stress. There are different kinds of validity - content validity, construct validity, and so on.
Retrospective/Ex Post Facto/ Case Control Studies-Example: A study linking smoking to lung cancer -Hypothesis: smoking (independent variable X) is related to and a determinant of lung cancer (dependent variable Y). -Examine the results of many studies in a specific area, assess the studies critically for reliability and validity, and then. SELECTED REFERENCES ON CHEMICAL INTOLERANCE AND TILT BY CLAUDIA S. MILLER, M.D. M.S. Book Ashford NA, Miller CS: Chemical Exposures: Low Levels and High Stakes. Second edition. New York, John Wiley and Sons, Inc., Book Chapters Miller CS, Ashford NA: Multiple Chemical Intolerance and Indoor Air Quality. In Indoor Air Quality Handbook.
In case-control designs. Despite the fact that recall bias is a major limitation of case-control studies, a number of methodological strategies documented in the literature can minimize recall bias: Using nested case-control design in which reported data on exposures are collected at baseline and throughout a cohort study, if feasible concerns have been raised about the validity and reliability although three used a case-control study •use of self-reported data and parent-proxy reports.
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Understanding reliability vs validity. Reliability and validity are closely related, but they mean different things. A measurement can be reliable without being valid.
However, if a measurement is valid, it is usually also reliable. What is reliability. Reliability refers to how consistently a method measures something. Case-Control Study. The original railroad worker case-control study was designed as a matched case-control study of lung cancer and diesel exhaust exposure [Garshick et al., ].
Between March 1, and Februthere w deaths among U.S. railroad workers eligible for benefits and death certificates were collected in 87% Cited by: This case–control design of deceased and similar living people (reported on by the same informant) enables evaluation of exposures potentially associated with longer life.
However, there are potential issues. Firstly, some cases had no control giving a mixture of cases and matched cases and controls with possibly correlated proxy by: Evaluating Information: Validity, Reliability, Accuracy, Triangulation Teaching and learning objectives: 1. To consider why information should be assessed 2.
To understand the distinction between ‘primary’ and ‘secondary sources’ of information 3. To learn what is meant by the validity, reliability, and accuracy of information 4.
What is Validity and Reliability in Qualitative research. In Quantitative research, reliability refers to consistency of certain measurements, and validity – to whether these measurements “measure what they are supposed to measure”.
Things are slightly different, however, in Qualitative research. Reliability in qualitative studies is mostly a matter of “being thorough, careful and.
The clinic-based case-control study (or the more common hospital-based case-control study) is often considered to be highly susceptible to bias and to have lower external validity, although these concerns are not absolute and need to be evaluated for a specific study in the context of epidemiologic design principles and goals of the study.
Validity. Validity is defined as the extent to which a concept is accurately measured in a quantitative study. For example, a survey designed to explore depression but which actually measures anxiety would not be considered valid.
The second measure of quality in a quantitative study is reliability, or the accuracy of an other words, the extent to which a research instrument.
VALIDITY AND RELIABILITY 3 VALIDITY AND RELIABILITY INTRODUCTION In Chapter 2, the study’s aims of exploring how objects can influence the level of construct validity of a Picture Vocabulary Test were discussed, and a review conducted of the literature on the various factors that play a role as to how the validity level can be influenced.
In the hospital-based National Cancer Institute case–control glioma study only 16 % of glioma patients were interviewed by proxy, while the Northern California case–control glioma study, which ascertained cases through a cancer registry, had a proxy.
analyzed reliability and validity of the medical outcomes study short form version 2 in adults with non-cancer pain [Hayes, et al. Yoshida, et al.
() have analyzed the patient centered assessment method is a valid and reliable scale for assessing patient complexity in the. In Study I, lung cancer cases, cases of other types of cancer, and population controls were identified and attempts were made to interview them.
Of these, (79%) lung cancer cases, (80%) other cancer cases, and. Background Benzene, toluene and xylene (BTX) are aromatic hydrocarbons with inconclusive evidence of lung carcinogenicity. The aim of this research was to assess the associations between occupational exposures to BTX agents and lung cancer.
Methods In a population-based case-control study of lung cancer, occupational histories were obtained and exposures were assessed by experts.
They are generally less reliable for self-reported recent quitters, for occasional smokers (5), and when more detailed smoking information is required (2, 3, 6, 7).
Although the reliability of proxy reports of parental smoking status by adult children has been assessed (6), no reports have yet examined the reliability of reports by young children. Objective: This study aimed to determine the psychometric properties of sociocultural attitude towards appearance questionnaire in female adolescents.
Method: This was a methodological study. The English version of the questionnaire was translated into Persian, using forward-backward method. Then the face validity, content validity and reliability were checked. The validity test goes through two stages, namely convergent validity, and discriminant validity.
Taherdoost  states that convergent validity is often used in behavioral sciences. INTRODUCTION. Community-based case-control studies play an important role in identifying occupational risk factors for rare diseases and diseases of long latency, such as cancer and neurodegenerative diseases ().Depending on the prominence of the hypotheses related to occupational exposures, the approach used by the investigator may range from relatively simple (e.g.
exposure. Evaluating the quality of research is essential if findings are to be utilised in practice and incorporated into care delivery. In a previous article we explored ‘bias’ across research designs and outlined strategies to minimise bias.1 The aim of this article is to further outline rigour, or the integrity in which a study is conducted, and ensure the credibility of findings in relation to.
In choosing controls for a case control study, the most important factor to consider is a. That the controls are not exposed You reported that from a group of people with lung cancer, 87 smoked and 24 did not smoke. This quantity is known as a: a. Rate b.
Ratio reliability & validity. Start studying Study Validity & Reliability in Case Control and Cohort Studies. Learn vocabulary, terms, and more with flashcards, games, and other study tools. When assessing a positive relationship between alcohol consumption and oral cancer using a case-control study, increasing the sample size of the study will result in: You are planning a case-control study of lung cancer to test the hypothesis that vegetable consumption is protective against lung cancer.
(reliability & validity. We were aware of our potential for biases, and to address this, we followed the guidelines of Leung () of increasing the validity and reliability of findings from a qualitative study.
The.Identify the need for reliability and validity of instruments used in evidence-based practice. 2. Define reliability and validity.
3. Discuss how reliability and validity affect outcome measures and conclusions of evidence-based research. 4. Develop reliability and validity coefficients for. Reliability is defined as the degree to which a measurement is error-free and provides consistent results over time.
There are three approaches to evaluate reliability: 1.