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The Mantel-Haenszel weighted odds ratio, risk ratio, summary chi square, and p-value calculations combine results from different strata to remove confounding caused by the variables used for stratification. If tables are created for male and female, confounding by sex is removed.
- Population Survey
This input designates the ratio of the variance of responses...
- Tables (2 X 2, 2 X N)
Given a yes-no or other two-choice response describing...
- Population Survey
Odds Ratio. The OR is the preferred measure of association for case–control data. Conceptually, it is calculated as the odds of exposure among case-patients divided by the odds of exposure among controls. However, in practice, it is calculated as the cross-product ratio. Using the notations in Handout 8.3, OR = ad/bc
The odds ratio for each table is 1.0, and the Mantel summary odds ratio is 1.0. The crude odds ratio and the Mantel summary odds ratio are quite different (4.0 and 1.0), concluding that smoking was a confounding factor and there appears (with this over simplified analysis) to be no association (odds ratio= 1.0) between alcohol and MI.
Print. Summary and References. Because many of the variables encountered in field epidemiology are nominal-scale variables, frequency measures are used quite commonly in epidemiology. Frequency measures include ratios, proportions, and rates. Ratios and proportions are useful for describing the characteristics of populations.
24 Απρ 2024 · Introduce the most common methods to assess risk in epidemiology: the odds ratio, and the relative risk. Learn how to analyze and report the odds ratio, and the relative risks as common methods of assessing risk from the results of epidemiological research studies
22 Μαΐ 2023 · The odds ratio is a ratio of two sets of odds: the odds of the event occurring in an exposed group versus the odds of the event occurring in a non-exposed group. Odds ratios commonly are used to report case-control studies. The odds ratio helps identify how likely an exposure is to lead to a specific event.
Odds Ratio. The odds ratio is a relative measure of association typically used in case–control studies. It compares the odds of being exposed among cases (persons with disease) with the odds of being exposed among controls (persons without disease) (Table 2).
