FNDC5 and cancer: Interestingly, when Ln-transformed omentin-1 levels were added to Model 4 (Model 5, overall p for trend: p=0.02), with either BMI or TBF%, in post hoc pairwise comparisons, irisin levels in the control group remained significantly lower compared to the treatment-naïve cancer group only (p=0.02) (Figure 1(b)).