st: Regression splines with survey data

["Prisciandaro, James J" <priscian@musc.edu>]

Hello list,

I am hoping to do some analyses using regression splines with survey data. Specifically, the data have sample weight and stratification (and possibly cluster) variables that need to be taken into account. I was wondering which regression spline programs will work with "svy" in stata; I've noticed most regression spline programs are user contributed, and there are probably much more than I am aware of, but I am particularly interested in multivariable regression spline models by Royston ("mvrs"). I'm also aware of mkspline and bspline. 

If it weren't for the complex sampling aspect, I would be using a free equivalent of the MARS program (e.g., Earth for R). 

Thanks in advance,
Jim

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