  By means of a simple rescaling, modifications of hadron masses and widths are
incorporated into the thermal analysis of particle ratios in ultra-relativistic
heavy-ion collisions. We find that moderate, up to 20%, changes of hadron
masses do not spoil the quality of the fits, which remain as good as those
obtained without modifications. The fits with the modified masses yield,
however, modified values of the optimal temperature and baryon chemical
potential. In particular, with decreasing masses of all hadrons (except for
pseudo-Goldstone bosons) the fitted values of the temperature and the baryon
chemical potential are lowered, with the change approximately proportional to
the scaling of masses. In addition, we find that the broadening of the hadron
widths by less than a factor of two practically does not affect the fits.
