In logistic regression analysis, the inflammatory markers CRP (OR 2.961 (95%CI 1.637–5.355), p < 0.001) and neopterin (OR 1.174 (95%CI 1.080–1.277), p < 0.001), as well as a higher Kyn/Trp ratio (OR 1.053 (95%CI 1.023–1.084), p < 0.001), were predictive for anemia—independent of sex, age, or UICC stage. Here, CRP is linked to anemia.