Bivariate model — non-linear association
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Hi All,
I am working on a bivariate model for two continuous variables (normally distributed).
I have checked the association between these variables and looking at the plots the relationship seems to be non-linear. I have run a regression model and the association is significant but it is probably better explained by a quadratic or U-shaped association.
My question is about the bivariate model. Would it be biassed? Is there any way to model these non-linear associations in a twin model? What would be the best approach for this scenario?
Thank you so much in advance.
Interesting question. Can…
Interesting question. Can you share a scatterplot of the two variables to show the non-linearity? Is there anything about the variables that would make you expect non-linearity or other distributional properties?
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