# Tagged Questions

1answer
26 views

### Estimating the effects of cumulative odds ratios - additive or exponential?

I have run some regression models that examine the effect of variable X (a 15 point continuous scale) on Y (a binary variable - not perform/perform a particular behaviour) using logistic regression. ...
2answers
81 views

### Concerns about the size of odds-ratio estimates in binary logistic regression model

I am creating some binary regressions and am wondering if I should be surprised by the size of the odds ratios. In this particular example, the dependent variable indicates whether a student can ...
1answer
57 views

### PROC LOGISTIC, GENMOD

How can I get the standard error for odds ratios. I know how to obtain ORs, either by exp the estimate or by using LSMEANS or SLICE statements. Unfortunately wasnt able to find the options to have ...
0answers
134 views

### How to estimate Relative Risks in Multivariate Binary Logistic Regression Models, instead of Odds Ratios?

All software programs I have tried report only odds ratios (ORs) for binary logistic regression predictors (as exponential of the betas). I am interested to know how can I compute the relative risk ...
2answers
180 views

### Odds and odds ratios in logistic regression

I am having difficulties understanding one logistic regression explanation. The logistic regression is between temperature and fish which die or do not die. The slope of a logistic regression is ...
2answers
134 views

### 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 ...
2answers
203 views

### 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? ...
1answer
343 views

### How to calculate 95% CI for OR for a different reference category without running the SAS logistics again?

My question is about calculation of confidence interval (CI) for odds ratio (OR) from a SAS output of a logistic regression model for a different reference category without running the SAS program ...
1answer
321 views

### Hypothesis test for odds ratios

I have two possible exposure variables (A and B) for use in a statistical model predicting a binary health outcome. I have fitted models with each variable separately and now know that one variable ...
2answers
2k views

### Exponentiated logistic regression coefficient different than odds ratio

As I understand it, the exponentiated beta value from a logistic regression is the odds ratio of that variable for the dependent variable of interest. However, the value does not match the manually ...
1answer
1k views

### Interpretation of simple predictions to odds ratios in logistic regression

I'm somewhat new to using logistic regression, and a bit confused by a discrepancy between my interpretations of the following values which I thought would be the same: exponentiated beta values ...
1answer
1k views

### Odds ratio for continuous variable

I have a question How would you interpret the odds ratios for a continuous variable?
0answers
2k views

### The effect of skewed continuous predictors in a binary logistic regression model

I am analyzing data with a binary outcome and a variety of continuous and categorical (including dichotomous) predictor variables. My approach is to perform a binary logistic regression and to treat ...
1answer
3k views

### Poisson regression to estimate relative risk for binary outcomes

Brief Summary Why is it more common for logistic regression (with odds ratios) to be used in cohort studies with binary outcomes, as opposed to poisson regression (with relative risks)? Background ...
1answer
397 views

### Odds ratios multiple comparisons

I have to assess for each product p, the odds ratio associated (success/failure). The data are in this table: ...
3answers
9k views

### 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 ...
1answer
935 views

### 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 ...
1answer
2k views

### Relation between logistic regression coefficient and odds ratio in JMP

From the output of a logistic regression in JMP, I read about two binary variables: Var1 estimate -0.1007384 Var2 estimate 0.21528927 and then ...