NGF and metabolic syndrome: Women who were in the higher tertile of serum NGF levels had significantly lower risk of hypertriglyceridemia (OR = 0.103, 95% CI: 0.028-0.374, P trend = 0.001) and MetS (OR = 0.220, 95% CI: 0.074-0.648, P trend = 0.008) compared to the reference group.