Abstract: Objective To investigate the incidence and related risk factors of aspirin resistance (AR) in elderly patients. Methods Clincal data of ninety elderly patients who were treated in the Second People's Hospital of Hefei from December 2016 to July 2020 were collected. They took aspirin orally for more than one year with daily dose of 100 mg. The inhibition rate of aspirin on platelet was detected by thromboelastography(TEG), and the general biochemical indexes of all patients were tested. The results were analyzed, and the inhibition rate ＜50% was recorded as AR. Chi square test was used to evaluate the relationship between AR and related factors of patients' general condition. Multivariate logistic analysis was used to analyze the independent risk factors of aspirin resistance in elderly patients. Results A total of 90 patients were included, the average age was (74.06±7.90)years old, AR was 17.78% (16/90); AR had no significant difference in age, gender, smoking, creatinine, uric acid and other factors between groups, but there were significant differences in fasting blood glucose, platelet count, low density lipoprotein (LDL) between groups (P＜0.05). Logistic analysis showed that fasting blood glucose and LDL were closely related to the occurrence of AR in elderly patients (P＜0.01, OR=3.97, 95% CI=0.889-9.714), (P＜0.05, OR=3.11, 95% CI=2.42-4.01). Conclusions Fasting blood glucose and LDL seem to be the independent risk factors of AR in elderly patients. Active intervention is necessary to implement.

Key words: thromboelastography, aspirin resistance(AR), fasting blood glucose, low density lipoprotein