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%.
Sales tax is imposed on the sale of goods and certain services in South Carolina. The statewide sales and use tax rate is six percent (6%). Counties may impose an additional one percent (1%) local sales tax if voters in that county approve the tax. Generally, all retail sales are subject to the sales tax. A tax return is due even if you had no sales for the month. You can file a 0or no sales return by calling us at 803-898-5918. Sales and Use Tax accounts are set up with a monthly filing frequency. Quarterly and annual filing frequencies must be approved by the SCDOR.