Distribution of SDS for serum creatinine, serum BUN, SBP, and DBP per quintiles of KS. Quintiles are expressed in SDS (see Figure 1B): 1st quintile, < −0.85; 2nd quintile, from −0.85 to −0.22; 3rd quintile, from −0.23 to +0.24; 4th quintile, from +0.25 to +... Distribution of SDS for serum creatinine, serum BUN, SBP, and DBP per quintiles of KS. Quintiles are expressed in SDS (see Figure 1B): 1st quintile, < −0.85; 2nd quintile, from −0.85 to −0.22; 3rd quintile, from −0.23 to +0.24; 4th quintile, from +0.25 to +0.84; 5th quintile, > +0.84. Giacomo Di Zazzo et al. CJASN 2011;6:107-113 ©2011 by American Society of Nephrology