The elevated creatinine indicates some degree of renal dysfunction. There are many, many causes for this - and a full explaination beyond the scope of this forum - but this should be evaluated with your personal physician.
Dehydration can certainly lead to an elevated creatinine level, as well as blockages of the GU tract, infection, and other kidney disease. If dehydration has been ruled out, you can consider a urinalysis as well as a kidney ultrasound.
The RDW is part of the complete blood count (CBC). It reports whether all the red cells are about the same width, size, and shape and helps classify cases of anemia.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b