title: Interfering Effect of Black Tea Consumption on Diagnosis of Pancreatic Cancer by CA 19-9.
abstract: OBJECTIVE
  The study aims to determine the possible effects of black tea consumption on the level of CA 19-9 antigen in the human body.
  
  
  METHODS
  The level of CA 19-9 was measured in 270 healthy individuals who consumed heavy amounts of black tea.
  
  
  RESULTS
  About 43.3 % of involved individuals were revealed to have elevated levels of CA 19-9. Males with high values of CA 19-9 represented the greatest number of involved individuals. The cutoff value of high levels of CA 19-9 in all individuals was ranged 69-105 U/ml.
  
  
  CONCLUSIONS
  Consuming heavy amounts of black tea could be considered an important interfering factor that affects the levels of CA 19-9. The cutoff or predictive value of CA 19-9 in heavy-consuming people of black tea was determined.
authors.affiliation: Department of Clinical laboratories, Collage of Applied Medical Sciences, University of Karbala-Iraq, Karbala, Iraq. aljanabi_bio@yahoo.com.
authors.forename: Ali Abdul Hussein S
authors.initials: AAHS
authors.lastname: Al-Janabi
authors.affiliation: Department of Medical care, Karbala Factory of Gypsum and Cement, Karbala, Iraq.
authors.forename: Ekhlas F
authors.initials: EF
authors.lastname: Tawfeeq
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis / Q000097:blood / Q000378:metabolism; D018395:CA-19-9 Antigen / Q000032:analysis* / Q000097:blood / Q000378:metabolism; D028241:Camellia sinensis / Q000737:chemistry*; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000097:blood / Q000175:diagnosis*; D011237:Predictive Value of Tests; D012737:Sex Factors; D013662:Tea / Q000737:chemistry / Q000378:metabolism*
chemical_list: D014408:Biomarkers, Tumor; D018395:CA-19-9 Antigen; D013662:Tea
keywords: Black tea; CA 19-9; Pancreatic cancer