d STB-49 sg81_1. Multivariable fractional polynomials: update. 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^ and help ^stmfracp^. f sg81_1/brcancer.dta f sg81_1/frac_ord.ado f sg81_1/frac_rep.ado f sg81_1/frac_sel.ado f sg81_1/mfracpol.ado f sg81_1/mfracpol.hlp f sg81_1/stfracp.ado f sg81_1/stfracp.hlp f sg81_1/stmfracp.ado f sg81_1/stmfracp.hlp