CHI3L1 and coronary artery disorder: Interestingly, serum YKL-40 cut-offs of 100 ng/ml (median) and 150 ng/ml (3/4 interquartile) had a good ability to estimate MACE in CHD patients, but when it was a cut-off of 80 ng/ml (1/4 interquartile), it lacked predictive value.