Establishment of risk model for pancreatic cancer in Chinese Han population

Table 2 Inclusion and exclusion criteria for patients and controls

Inclusion criteria		Exclusion criteria
Patients	(1) The patient voluntarily took part in this research; agreed to take necessary clinical examinations and answer epidemiological questionnaire survey; and give consent to the publication of research data.	(1) The patient did not agree upon the conditions to participate in the study or the patient information was not available at the inclusion time.
	(2) Diagnosed by the pancreatic cancer team from PUMCH.	(2) Not diagnosed by the pancreatic cancer team from PUMCH.
	(3)Clinical examination and epidemiological investigation were acceptable for the patient’s condition.	(3) The patient’s condition did not allow the clinical examination and epidemiological investigation.
	(4) Patient was diagnosed for pancreatic cancer between 2002 and 2004.	(4) The patient was not diagnosed for pancreatic cancer for the first time between 2002 and 2004.
	(5) Patients did not undergo radiotherapy and anticancer therapy before surgery, and did not have other primary tumors.	(5) Patients whose pancreatic tumor was a metastatic carcinoma or who had other tumors.
	(6) Patients belonged to Han nationality.	(6) Patients were not from Han nationality.
Controls	(1) The person voluntarily took part in this research; agreeed to take necessary clinical examinations and answer epidemiological questionnaire survey; and give consent to the publication of research data.	(1) The person did not agree upon the conditions to participate in the study or the person’s information was not available at the inclusion time.
	(2) The person did not have any kind of tumor.	(2) Person had any kind of malignant tumor.
	(3) The person matched with the patients for gender and age (±5 years).	(3) Person suffered from severe coronary heart disease or stroke.
	(4) Being the resident of Beijing or its peripheral area for at least 5 years.	(4) Person did not match with the patient group for gender and age (±5 years).
	(5) Han nationality.	(5) Not from Han nationality.