ArticlesIncretin therapies and risk of hospital admission for acute pancreatitis in an unselected population of European patients with type 2 diabetes: a case-control study
Introduction
Incretin-based therapies for type 2 diabetes include two drug classes. The first class, glucagon-like peptide-1 (GLP-1) receptor agonists, includes drugs that mimic the action of native GLP-1, such as the injectable GLP-1 analogues exenatide and liraglutide. The other class includes drugs that delay the catabolism of native GLP-1 mainly through inhibition of the endogenous enzyme dipeptidyl peptidase 4 (DPP-4), thus extending the action of native GLP-1. The DPP-4 inhibitors sitagliptin, vildagliptin, saxagliptin, and linagliptin, in order of their prevalence of use in the market in Europe, are all taken orally. Although cases of haemorrhagic or necrotising pancreatitis have been reported in patients taking these drugs, a clear-cut pharmacoepidemiological association between incretin treatment and increased risk of pancreatic damage has not been shown. Incidence of acute pancreatitis is higher in patients with type 2 diabetes than in the non-diabetic population, irrespective of treatment.1, 2 Further complicating the issue is the fact that several drugs commonly used in the treatment of type 2 diabetes (eg, non-incretin anti-diabetes drugs, statins, and angiotensin-converting enzyme inhibitors) have been reported to increase the risk of acute pancreatitis.3, 4, 5
After publication of several studies that were criticised because of inadequate statistical power and short duration of follow-up,6, 7, 8, 9 a report by Singh and colleagues10 provided some evidence for an association between use of incretins and negative effects on pancreatic function. In their case-control study10 of an administrative database of adults aged 18–64 years with type 2 diabetes in the USA, treatment with two incretins (sitagliptin and exenatide) was associated with increased chance of hospital admission for acute pancreatitis.
To our knowledge, no such analysis has been done on data from European administrative databases that, owing to the universal nature of most European national health systems, encompass the whole population and include all types of available incretins. Therefore, we aimed to assess whether an association exists between incretin therapies and hospital admissions for acute pancreatitis in unselected European patients with type 2 diabetes.
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Study design and participants
In our population-based case-control study, we used regional administrative data from the Piedmont region in northwest Italy, which contains about 4·4 million inhabitants. The population is covered by an automated system of databases that records all drugs dispensed from all regional pharmacies, and hospital discharges reimbursed by the Italian National Health System. These archives can be linked together by a unique anonymous identifier that is encrypted to protect patients' privacy. Because
Results
For the study period examined, 1003 cases of acute pancreatitis and 4012 controls with type 2 diabetes met the inclusion criteria (figure). Compared with controls, prevalence of known risk factors for acute pancreatitis was increased in cases, although other baseline characteristics did not differ (table 1). Prevalence of cardiovascular disease was higher in cases than controls, but prevalence of diabetic retinopathy did not differ between groups. Types of incretin used did not differ between
Discussion
Whether incretin therapies cause acute pancreatitis has raised concern among practitioners.12, 13, 14 In our analysis of a large unselected population of treated individuals with type 2 diabetes, no association was noted between incretin use and incidence of acute pancreatitis, irrespective of causality.
Our findings are in line with previous reports of US administrative databases6, 7, 8, 9 that suggested no link between the use of incretins and pancreatic events in patients with type 2
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2017, PancreatologyCitation Excerpt :We also performed sensitivity analyses to examine whether the main findings met different assumptions for cholelithiasis, alcoholic-related disease, hypertriglyceridemia, and obesity. Our results are in line with previous large cohort studies in the West [2,8,20] and also support recent findings in Asian countries [19]. Compared with previous case-control studies, our population-based cohort study design enables us to establish a Kaplan-Meier curve and to analyze any significant difference between the two cohorts with regard to time to acute pancreatitis.
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