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Dummy-coded predictors and reference ... |
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Message/Author |
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We are conducting a series logistic regressions using the TYPE=COMPLEX in which dummy-coded ethnicity (9 schemes with 8 dummy codes each) predicting a dichotomous outcome. In one model when ethnic group A is the reference, results show that ethnic group B (vs. group A) significantly predicts the outcome. However, when the same model is run with ethnic group B as the reference, results show that ethnic group A (vs. group B) does not significantly predict the same outcome. Nothing about the models (excepting the reference group of ethnicity) is different. How can this be happening? |
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Please send the 2 outputs to support along with your license number. |
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