Fig. 1
The preoperative clinical characteristics scoring system was designed based on OR values of risk factors. Factors including tumor size ≥7 cm, LDH ≥ 193 U/L were assigned 2 points, while factors including age ≥ 40 years old, NLR ≥ 2.8 and number of platelet ≥298 × 109/L were assigned 1 point. OR, odd ratio; LDH, actate dehydrogenase; NLR, neutrophil-to-lymphocyte ratio