One possible approach would be to use a relative change in creatinine (e.g. threefold) as the primary criterion, with an absolute cutoff (e.g. 4 mg/dL or about 350 mcmol/L) as a secondary criterion when baseline creatinine is abnormal. Similar approaches have been used in the literature (25,26).
The combined sales tax rate for Charleston, SC is 8.5%. This is the total of state, county and city sales tax rates. The South Carolina state sales tax rate is currently 6%. The Berkeley County sales tax rate is 0%. Charleston sales tax rate is 1%.
Depending on the zipcode, the sales tax rate of Columbia may vary from 7% to 8%. Every 2017 combined rates mentioned above are the results of South Carolina state rate (6%), the county rate (0% to 1%), the Columbia tax rate (0% to 1%), and in some case, special rate (1%).