Preoperative Serum Interleukin-6 Is a Potential Prognostic Factor for Colorectal Cancer, including Stage II Patients

Figure 1

Measured serum interleukin-6 (IL-6) values. (a) Preoperative serum IL-6 values for all patients (). The mean value was 6.6 pg/mL (range: 0.7–68.0). (b) Receiver operating characteristic curve of IL-6 according to survival. The optimal cutoff was determined as 6.3 pg/mL. (c) IL-6 values according to the disease stage. Mean values: stage I: 4.8 pg/mL, stage II: 7.5 pg/mL, stage III: 5.4 pg/mL, and stage IV: 10.2  pg/mL.

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