title: Patterns of upper aero-digestive tract cancers in Kamrup Urban District of Assam: a retrospective study.
abstract: BACKGROUND
  The incidence of upper aero-digestive tract (UADT) cancers, including C00-C14, C30-C32, C15 and C16, is increasing rapidly in Kamrup Urban District (KUD) of Assam, North East (NE) India. According to the NCRP (2013) report 37.6% of all cancers in both sexes are UADT cancers in the NE region, accounting for 53.3% in males and about 27.5% in females of the total cases
  
  
  METHODS
  A retrospective study was conducted for patient information from the period of 2008-2011. Age-standardized or age-adjusted rates (ASR or AAR) (per 100,000 person-years) were calculated using the World Standard Population as proposed by Segi and modified by Doll et al. The registry population area at risk was estimated using the 1991 and 2001 census population by sex, as well as the growth rate during that interval using the difference distribution method.
  
  
  RESULTS
  There were 5,638 cases registered during the last four years of the study (2008-2011) accounting for 56.7% (3,198/5,638) of the total in males and 43.3% (2,440/5,638) in females. The male: female ratio was 1.31: 1.00. The overall age adjusted rates (AAR) were 179.4 and 153.8 per 100 000 males and females respectively. Cancer of the oesophagus was most common in both sexes, with most appreciable gender variation for tongue and hypopharynx, presumably reflecting differential exposure to risk factors.
authors.affiliation: Population Based Cancer Registry, National Cancer Registry Programme (ICMR), Dr. B. Borooah Cancer Institute, India E-mail : manojkalita5354@gmail.com.
authors.forename: Jagannath Dev
authors.initials: JD
authors.lastname: Sharma
authors.forename: Manoj
authors.initials: M
authors.lastname: Kalita
authors.forename: Debanjana
authors.initials: D
authors.lastname: Barman
authors.forename: Arpita
authors.initials: A
authors.lastname: Sharma
authors.forename: Ranjan
authors.initials: R
authors.lastname: Lahon
authors.forename: Jamil Ahmed
authors.initials: JA
authors.lastname: Barbhuiya
authors.forename: Barsha
authors.initials: B
authors.lastname: Deka
authors.forename: Amal Chandra
authors.initials: AC
authors.lastname: Kataki
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002277:Carcinoma / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D004938:Esophageal Neoplasms / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007194:India / Q000453:epidemiology; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000453:epidemiology*; D010039:Otorhinolaryngologic Neoplasms / Q000453:epidemiology*; D012042:Registries; D012189:Retrospective Studies; D017678:Sex Distribution; D013274:Stomach Neoplasms / Q000453:epidemiology*; D055815:Young Adult