# Tagged Questions

Refers to a measure of association between two binary variables. If $X,Y$ are binary outcomes and $p_{ij} = P(X=i,Y=j)$, the odds ratio is equal to $${\rm OR} = \frac{ p_{11} p_{00} }{ p_{10} p_{01} }$$ When ${\rm OR} 1$ indicates a positive relationship. More info is available at ...

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### Exact version of Bowker's test?

I know there is an exact version of McNemar's test for symmetry, and am just wondering if there is an exact version for Bowker's test. From my understanding the exact version of McNemar's test uses ...
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### Regression with a ordinal scale dependent variable in the context of panel data

In my panel data I observe a quite large amount of different individuals for a fixed time duration. The time axis is fixed for every individual, i.e., I observe 20 time points for every individual. ...
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### Different odds ratios from formula and R's fisher.test

In the following example ...
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### Why is the CI for an odds ratio not always centered on the sample value?

Also, what will tend to produce a CI in which the sample value is far above the center, or far below the center?
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### How to compare whether the odds of success of different levels of a predictor are different from 0

I hope I am able to word my question clearly. Suppose I have a model below: glmer(Y~X + (1|subject), family="binomial", data=dat) The intercept is the log odds ...
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### Logistic regression and odds ratio

If the odds ratio is greater than one with an insignificant p value for a variable in logistic regression should the variable be kept in the model? Can I select the variable with odds close to 1? ...
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### How to conduct a meta-analysis on studies that report results variously as odds ratios, hazards ratios, or rate ratios?

I'm doing a meta-analysis of some studies that report results variously as odds ratios, hazards ratios or rate ratios (all with confidence intervals). Is there any way to combine these ...
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### Generating data with a pre-specified odds ratio

I have to simulate (in javascript) the likelihood that members of a certain population would have a disease, given a contextual value. All information I have comes from papers that show odds ratios ...
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### What is the best statistical method to compare case fatality rates of 17 years for 2 different states?

I have Case Fatality Rates (deaths per 100 cases) for 2 different states receiving different treatments for 17 years. What is the best statistical method to compare Case Fatality Rates ? The data ...
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### Odds ratios multiple comparisons

I have to assess for each product p, the odds ratio associated (success/failure). The data are in this table: ...
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### How to calculate confidence intervals for pooled odd ratios in meta-analysis?

I have two datasets from genome-wide association studies. The only information available are the odd ratios and their confidence intervals (95%) for each genotyped SNP. My want to generate a forest ...
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### Logistic Regression in R (Odds Ratio)

I'm trying to undertake a logistic regression analysis in R. I have attended courses covering this material using STATA. I am finding it very difficult to replicate ...
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### How to assess effect of intervention in one state versus another using annual death rate data?

I am a beginner in statistics. I have these unpublished data (cases and deaths) of a disease for 7 years (2004-2010) from 2 neighbouring states. The study was started in 2004. State 1 and State 2 ...
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### What does “case-control” and “cross-sectional” mean in the context of logistic modeling?

While studying logistic modeling, I read the following statement The fact that only odds ratios, not individual risks, can be estimated from logistic modeling in case-control or ...
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### Probability calculation, system uptime, likelihood of occurence

(redirected here from mathoverflow.net) Hello, At work I was asked the probability of a user hitting an outage on the website. I have some following metrics. Total system downtime = 500,000 seconds ...