Abstract: Objective Through measuring the carotid intima-media thickness(IMT)of the patients with early stage carotid atherosclerosis(CAS) disease, to indicate the subsequent occurrence of vascular events.Methods The carotid IMT of 164 patients with early stage CAS was measured by ultrasonography with(26 ±4)months follow-up.The data of vascular events were statistically analyzed.Results The overall incidence rate of vascular events was 19.5%(32/164); the incidence of the group IMT< 1.11 mm was 6.7%(6/89); the group IMT > 1.11 mm was 34.7%(26/75); each additional 0.1 mm above the IMT ≤ 1.11 mm benchmarks,the risk of vascular events had a 1.37-fold increase.Conclusion IMT can be an independent predictor of vascular events risk in patients of early CAS and provide a clinical basis in the early CAS prevention and treatment.