Abstract:Objective To assess the clinical features of acute pancreatitis (AP) in patients aged 70 years and older. Methods Clinical data of 342 patients aged 70 years and older (group A) who diagnosed AP in our hospital from June 2013 to March 2018 were retrospectively analyzed. And 684 patients of AP aged 15 to 59 (group B) were randomly selected as the control group during the same period. Results ① The ratio of male to female was 1: 1.55 in group A, so the composition with group B (1.79: 1) was significant different from group A (P < 0.05). ② The first etiological cause of group A was biliary disease (54.97%) and that of group B was hyperlipemia (44.01%), and there was statistically difference between the two groups (P < 0.05). ③ The average levels of amylase, ALT, AST, direct bilirubin and creatinine in group A were higher than those in group B, while the average levels of serum calcium, total cholesterol, triglycerides and albumin were lower than those in group B (P < 0.05). ④ The prevalence of hypertension and coronary heart disease in group A was higher than that in group B (P < 0.05). Compared with group B, group A was more prone to encounter respiratory failure, renal failure, biliary tract infection and pulmonary infection, which makes statistically sense between the two groups (P < 0.05). ⑤ The total mortality and SAP mortality rates of group A were higher than those of group B, which makes significant difference between the two groups (P < 0.05). Conclusions Women make up a higher proportion of patients aged 70 years and older who diagnosed AP.The main cause of senile AP is biliary disease. And senile AP has more complications and higher mortality rate. We should attach great importance to understanding its clinical features to propose targeted diagnosis and treatment plans.