Preoperative CRP levels did not differ between the groups ( P = 0.351 ) and in all patients they were lower than 20 mg/L , but postoperative CRP was significantly higher in propofol group ( 316 vs 157 ng/L ; P = 0.035 ) ; Pre - and postoperative procalcitonin was within the reference range ( < 0.04 g/L ) in both groups .