CHI3L1 and neoplasm: Including YKL-40 tissue expression (negative or ≥ 5% positive tumor cells) in a multivariate Cox regression analysis with FIGO stage, patient age, radicality of surgery and serum CA-125 as other parameters, showed no prognostic impact of YKL-40 tissue expression (HR = 0.97; 95% CI: 0.99 – 1.01) (data not shown).