d STB-43 sg81. Multivariable fractional polynomials. d STB insert by d Patrick Royston, Imperial College School of Medicine, UK; d Gareth Ambler, Imperial College School of Medicine, UK. d Support: proyston@@rpms.ac.uk and gambler@@rpms.ac.uk d After installation, see help ^mfracpol^. f sg81/_fracdis.ado f sg81/_fracin.ado f sg81/_fracord.ado f sg81/_fracrep.ado f sg81/legulcer.dta f sg81/mfracpol.ado f sg81/mfracpol.hlp