Chronic pancreatitis (CP) is a disease characterized by inflammation and their replacement by fibrotic tissue. The destruction of pancreatic function and structure are the main complications. This retrospective-prospective, multicenter, cohort study was conducted. This study aimed to observe the natural history of CP in China, analyse the risk factors for CP complications, and establish individual predictions.

In order to track changes consistently throughout the course of CP and facilitate the evaluation and study of CP, a dedicated database, CP Database (version number 2.1, YINMA Information Technology Inc., Shanghai, China), was established to collect clinical data of CP patients who were admitted to our centers. Data befor CP Database established were retrospectively collected according to the electronic medical record system and complemented through telephone, letter, and e-mail inquiries. Data were prospectively collected since CP Database was established. The following information was documented in detail: demographic data (age, sex, birthplace, et al), course of CP, medical history, history of other diseases, smoking and alcohol history, family history of pancreatic diseases and diabetes mellitus (DM), laboratory and imaging findings, and treatment strategy.

Inclusion Criteria:

• Patients diagnosed with chronic pancreatitis according to Asia-Pacific consensus

Exclusion Criteria:

• Pancreatic cancer diagnosed within 2 years after the diagnosis of chronic pancreatitis
• Groove pancreatitis
• Autoimmune pancreatitis

Chronic pancreatitis patients in China