# logistic regression

1. ### Can I calculate covariation for binary logistic output from SPSS

Hi, I am using SPSS to identify moderation relationships. I am using binary logistical regression when the outcome variable could not be transformed to normal, so have recoded into high and low groups. I am then using a very cool program I found on the internet to graph the moderation...
2. ### Logistic regression with dummy variables and regular variables

Hello. My logit regression for a sample of 182 has 4 significant explanatory variables. One of these variables is a dummy variable and the rest are regular ratio type data point variables. Given this, how do I interpret my grand mean and intercept term? And how do I interpret the coefficient...
3. ### Binary Logistic Regression with categorical predictors and interactions.

I'm new to logistic regression and the project I'm working on requires a model that involves two predictors: Experimental condition (categorical variable with 8 categories) Score on a measure (continuous variable) So, one categorical predictor and one continuous predictor. But, these two...
4. ### Lagged independent variable (Stata)

Hello, I'm currently working with a company dataset in the form of an unbalanced panel (overall sample size: 1.300 company years, T: 10, X: ~170 different companies). One of two strategic types was assigned to each of the company years. To get a better understanding, why companies are...
5. ### Binary Logistic regression - Interaction containing more than 2 groups

Hello, I am running an Interaction which contains more than two groups, for example, the day of the week (monday, tuesday and so on). When this Interaction is created with another IV (covariate), should this day_of_the_week variable be set as categorical? I looked online, a lot of blogs...
6. ### [SPSS - Binary logistic test - Interaction (moderator) ]

DV: dichotomous (0 = show, 1 = no-show) IV (covariates): Geslacht = Gender dvd_week = Day of the week Gender (0 = females, 1 = males) --> Indicator(first) dvd_week = (1 = monday, 2 = tuesday, ... , 7 = sunday) --> indicator(first) Interaction (moderator): dvd_week * geslacht...
7. ### leveraging logistic results

Here are the results of a logistic regression Number of Observations Used 97091 Response Profile Ordered Value buy Total Frequency 1 0 75484 2 1 21607 Prob Level Correct Incorrect Event Non-Event Event Non-Event 0.5 73141 2932 18675 2343 0.65 67934 6678...
8. ### Working out risk factors for a medical complication?

Hi All - HELP! I have a large dataset on women in labour, and I'm interested in finding out risk factors for a particular complication of labour. The complication is either there, or not there. I also have lots of information on possible risk factors for the complication, e.g.: length of...
9. ### Confidence limits for logistic regression equation

I have generated a logistic model for a disease status Y (unaffected-affected) using several independent variables on a very large (600K+) dataset. I then want to apply that formula to a much smaller subset of that data set, having a particular characteristic not included in the model. I then...
10. ### Ways to find interaction effects of 2 nominal variables on nominal dependant variable

Hello I am trying to doing analysis of interaction effects of 1-7 dichotomous or polychotomous dependent variables (nutrition type, either 2 or 3 levels) and one dichotomous variable (young or old age) on dichotomous dependent variable (hyptertension, yes or no). My thought is that as you...
11. ### p-value for bootstrap logistic regression

I am new with sas and I'm doing logistic regression with several predictive variables. I am using the following code; proc surveyselect data=subset method=urs samprate=1 rep=1000 out=boot; run; proc logistic data=boot outest=estimates ; model uq7_maxabin(event='1')= uq7_base v6500...
12. ### How to test if the odds of success are significantly different from zero

Hi all, Suppose I have a model below (in R): glmer(Y~X + (1|subject), family="binomial", data=dat) Where Y is the binary outcome variable and X is the sole predictor variable with 6 levels. The results of the regression test is below. The intercept is the log odds of success for the...
13. ### Logistic regression - "dependent variable has more than two non-missing values"

Hi there, I'm trying to run a logistic regression in SPSS 21. The column containing my dependent variables contains (so far as I can tell!) only 0s, 1s, and blank cells. Nevertheless, when I try to run the regression, SPSS tells me that "the dependent variable has more than two non-missing...
14. ### Correlation coeff vs. Logistic Regression Coeff.

From a bunch of data points which look like: 1 1 1 1 1 1 1 1 1 1 0 1 1 0 1 1 0 0 1 0 1 1 0 0 1 0 1 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 1 0 0 1 I get correlation coefficients as: 1 -0.301511345 0.204124145 -0.301511345 1 -0.287213479 0.204124145...
15. ### Logistic Regression - Equation

Hi! I run a logistic regression, and i know that it can be written as Pr(y=1)=F(a+b_1*x+b_2*z). With y being the dependent variable, a the intercept, b_ the coefficients and x&z the independent variables. Concerning the notation only: Any ideas how I could write this for x and z being...
16. ### Predicted Probability after Logit (...), fe

Predicted Probability after xtlogit (...), fe Hi! I ran a logistic regression (i.e. my dependent variable y is binary) with fixed-effects. Among a set of covariates z, my variable of central interest, x, is also binary (0/1) and shows a positive significant coefficient. [xtlogit y x...
17. ### Interaction and confounding in logistic regression

Hope someone here can help me out with the following problem! I’m looking for explanatory factors for a certain dichotomous health outcome, the patient either has the disease or not. I have a set of about 12 possible factors. Now I want to select the factors that play role in the occurrence...
18. ### Interval independent variable in binary logistic regression

Hi everyone: I am a bit new to logistic regression and I could use some advice. I am trying to discover the influence of various variables on voting turnout in an election study. Although I have one problem: The household income variable is coded as interval variable with 16 categories, each...
19. ### Logistic regression or GLM?

Hi everyone: I have a question about using logistic regression or GLM with only categorical variables as independent variables. The dependent variable y is shown as binary coded data where 1=males and 0=females. Each corresponding to an excrement. The independent variables are as follows...
20. ### Appropriateness of logistic regression

Hello, I am interested in the effects of gender on a set of variables. I have run a number of group mean t tests (with gender as the group variable), and have confirmed that the means for men and women across the different variables are different at statistically significant levels. This...