 Material and Methods Study design The data confirmed on 148 patients having PE by CTPA in the Clinic of Chest Diseases, Medical School, Yüzüncü Yıl University, Van, Turkey, in the period between January 2012 and August 2014 were retrospectively studied. The patients accompanying disorders, risk factors, and the dosing of D-dimer performed on the same day of the CTPA and RDW levels were noted. The patients who had a story of hospitalising for reasons other than surgery such as Pneumonia, apses, brucella, encephalitis and the bedridden patients such as hemiplegia and long-term immobilised patients 72 hours after surgery were listed in the immobilisation group. 