Zhang J, et al. - Among patients suffering from acute coronary syndromes (ACS) receiving percutaneous coronary intervention (PCI), it was inquired if and how small dense low density lipoprotein cholesterol (sdLDL-C) is related to cardiovascular (CV) events. Major cardiovascular and cerebrovascular adverse events were assessed as the primary outcome, which was defined as the composite of all cause of mortality, nonfatal myocardial infarction, nonfatal stroke or unplanned repeat revascularization. A follow-up of 18 months revealed an occurrence of 320 (5.2%) incident CV events. Among Chinese patients with ACS receiving PCI, a higher risk of CV events was observed in those who exhibited increased sdLDL-C, thus, offering additional value for better risk evaluation.