F2 and deep vein thrombosis: Eight biomarkers or indexes were found to have a significant ability to distinguish between DVT and non-DVT, including D-Dimer, TT, PT, albumin, RBC, HCT, platelet and PLR, with respective optimal cut-off value of 1.0 mg/L, 15.5 s, 11.5 s, 32.5 g/L, 2.7*1012/L, 34%, 214*109/L and 174, based on which they were dichotomized (Table 1).