PTH and diabetes mellitus: The results of the multivariate linear regression for serum UA (Table 2) indicate that a higher UA level was significantly related to male gender, younger age at dialysis, shorter entry year, lower prevalence of DM, higher pre-dialytic BW, lower Kt/V (Gotch), a higher nPCR, a higher albumin level, a higher log of cholesterol level, a higher phosphate (P) level, and a higher log of the parathydroid (PTH) level.