Reference group for regression coeffi... PreviousNext
Mplus Discussion > Categorical Data Modeling >
 Qiana Brown posted on Tuesday, June 03, 2014 - 8:07 pm
I want to make sure I am interpreting the probit regression coefficients correctly in my mediation model, where I used path analysis. Prior to importing my data to Mplus I coded categorical variables using a 0, 1 convention (e.g., 0 = non-smoker, 1 = Smoker).

However, in the Mplus output file under "UNIVARIATE PROPORTIONS AND COUNTS FOR CATEGORICAL VARIABLES" the categories for my three dependent variables are described using 1s and 2s ( "category 1 & category 2") instead of 0s & 1s.

My question is, what reference groups are being used in the probit regression models for the categorical outcomes and predictors? Does the regression model use my original 0, 1 coding, with 0 as the reference group, or are 1s and 2s used, with 1 as the reference group? Thank you.

Category 1 0.783 83.000
Category 2 0.217 23.000
Category 1 0.470 55.000
Category 2 0.530 62.000
Category 1 0.496 58.000
Category 2 0.504 59.000
 Linda K. Muthen posted on Wednesday, June 04, 2014 - 11:35 am
Category 1 is zero. This is the reference category.
 Qiana Brown posted on Wednesday, June 04, 2014 - 11:58 am
Thank you
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