Some Logistics Regression Questions and Answers

i. Question:  How can I report regression analysis results professionally in a research paper?

ii. Questions:  Is it weird to get a very big odds ratio in logistic regression?

Question:  How can I report regression analysis results professionally in a research paper?

Answer: Ouorou Ganni Mariel Guera

Instituto Politécnico Nacional

If the regression analysis was performed with the objective of obtaining an equation, you must present at least:

- The equation resulting from the adjustment of the model [(refer to the significance of the equation (results of F test) and the estimates of its parameters (results of t test)]

- The values of the goodness of fit analysis criteria: coefficient of determination, root of the mean square error (RMSE) or standard error of the esimative (Syx), bias and the graphs of residuals distribution (verify if these comply with the statistical assumptions of normality, homocedasticity and absence of serial autocorrelation) to verify, mainly, if there are no tendencies of overestimation or underestimation.

Regards !

Questions:  Is it weird to get a very big odds ratio in logistic regression?

Answer: Carol Hargreaves

National University of Singapore

 Yes, getting a large odds ratio is an indication that you need to check your data input for:

1. Outliers

2. Amount of Missing Values and handle the missing values

3. The metric used for the analysis may need to be changed for example from 'cents' to     'dollars'.

4. The way in which the data was coded may be incorrect and may need to be      

    changed.

5. If the standard deviation is too large may need to segment and perform your    

    analysis on segments.

The above 5 suggestions are examples of how to manage large odds ratio results, to make them more meaningful.

I hope this helps!

Kind Regards

Carol