Uncertainty on covariate

#1
Hi guys,

I'm working on the links between road traffic noise and mental health using multilevel modelling (level 1 = individuals - level 2 = census blocks). The noise level variable is one of my covariate, measured at the census block level.

For this covariate, i do not have a single value but a distribution of values (a mean and a standard deviation for each census block - normal distribution assumed).

How can i "insert" this uncertainty in my multilevel logistic model?

Thanks!