Since it is a ratio of ratios, the odds ratio is very difficult to interpret. The relative risk is easier to interpret, so the odds ratio alone is not very helpful. However, there are certain commonly occurring situations in which the estimate of the relative risk is not very good and ...
When adjusted using logistic regression to control for other factors, the effects of the probiotic drink in reducing antibiotic associated diarrhoea remained (odds ratio 0.25, 95% CI 0.07 to 0.85). The researchers concluded that consumption of the probiotic drink reduced the incidence of antibiotic ...
Stats: Odds ratio versus relative risk (January 9, 2001). • http://.childrens-mercy/stats/journal/oddsratio.asp – Stats: Number needed to treat (January 27, 2000). • http://.childrens-mercy/stats/ask/nnt.asp 7. Very bad joke A doctor is advising her patient about the risks ...
sinusitis from 27 trials.Any antibiotic versus placebo; amoxycillin or folate inhibitors versus newer, more expensive antibiotics.Clinical failures and cures.Compared with placebo, antibiotics decreased the incidence of clinical failures by half (risk ratio 0.54 (95% confidence interval 0.37 to 0.79))...
In clinical research, the odds ratio is often used to estimate the reduction in disease if patients receive a particular treatment.4 The risk ratio (RR) (also called the relative risk) is the ratio of the probability of the outcome in the exposed group to the probability of the outcome in...
The relative risk for the above hypothetical example of smokers versus non-smokers developing lung cancer is calculated as: Relative Risk = (17/100) / (1/100) = 0.17 / 0.01 = 17 Thus in our example, the odds ratio is 20.5 (smokers have 20 times the odds of having lung cancer than ...
The odds ratio (OR) is used as an important metric of comparison of two or more groups in many biomedical applications when the data measure the presence or absence of an event or represent the frequency of its occurrence. In the latter case, researchers
Summary This chapter presents odds ratio methods for analyzing stratified data from a closed cohort study in which there are two or more exposure categories. One of the aims is to compare asymptotic unconditional, asymptotic conditional, Mantel–Haenszel, and weighted least squares methods, and to ...
III. The odds ratio as an approximation to the relative risk. Purpose: This paper introduces readers to case-control studies and how to analyse them. Specifically, the odds ratio statistic is discussed. The importance... AS Rigby - 《Disability & Rehabilitation》 被引量: 96发表: 1999年...
An odds ratio (OR) calculates the relationship between a variable and the likelihood of an event occurring. A common interpretation for odds ratios is identifying riskfactorsby assessing the relationship between exposure to a risk factor and a medical outcome. For example, is there an association ...