5.1　Specific Definition of CP Stage A

Milosavljevic defined stage A as the early stage of CP where complications have not yet ocurred and the clinical exocrine and endocrine function is preserved.However，some subclinical signs such as impaired glucose tolerance，reduced exocrine function but without steatorrhea might already exist.Patients with pain of any type and degree and/or attacks of acute pancreatitis，no complications，no steatorrhea，no insulin-dependent diabetes mellitus may be divided as Stage A.(https://www.daowen.com)