Hi, thx in advance for your help. I am trying to build a spreadsheet that will help calculate medication doses. The variables involved are weight (wt) and creatinine clearance (CrCl). Here is the decision tree: if wt(C4) is >121 and CrCl(C8) is >= 50 then Infusion = 20 if wt(C4) is >121 and CrCl(C8) is < 50 then Infusion = 10 if wt(C4) is <=121 and CrCl(C8) is >= 50 then Infusion = (2*C4*60)/(0.75*1000) if wt(C4) is <=121 and CrCl(C8) is < 50 then Infusion = (1*C4*60)/(0.75*1000) Again, thx for your help, I just cant seem to get the syntax right... If it matters I am using Excel 2003 Thx Dan
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