Red cell distribution width (RDW) is a parameter that measures variation in red blood cell size or red blood cell volume.
If there is something on your credit report that you believe is incorrect you need to write to the credit reporting agency and ask them to remove it. If they can not get proof that the item was reported correctly they will remove it. Call or go to the website and learn how to do this.
So, it is better to try and remove the charge-off from your credit report. Even if you pay off the debt with the collection agency, the charge-off cannot be removed. A charge-off can be removed only by the original creditor.