title: Older adults with biliary tract cancer: treatment and prognosis.
abstract: OBJECTIVE
  To compare survival in older (≥65) and younger (<65) individuals with biliary tract cancer (BTC) and to determine whether treatment efficacy varies according to age.
  
  
  METHODS
  Retrospective cohort study and nested case-control study.
  
  
  METHODS
  Tertiary referral center in Korea.
  
  
  METHODS
  Five hundred thirty-one individuals diagnosed with BTC from 2003 to 2011.
  
  
  METHODS
  Demographic and clinical characteristics of 326 older (≥65) and 205 younger (<65) individuals with BTC were compared. Differences in survival were also assessed after matching according to propensity score.
  
  
  RESULTS
  There were no significant differences in sex, symptoms and signs, tumor histology, stage, or surgery between the two groups, but older participants had more comorbidities and poorer performance status and underwent less chemotherapy and radiotherapy (P < .05). Survival of the two groups was compared. After adjustment for baseline characteristics using the propensity score method, survival was still comparable (P = .72). When survival of older participants in the treatment group (TG, those who underwent surgery, chemotherapy, or radiotherapy) was compared with that of those in the supportive care group (SCG, those who received only supportive care), those in the TG had a longer survival time than those in the SCG (P < .001). This result was confirmed in the propensity analysis (including individuals undergoing surgery, P < .001; excluding individuals undergoing surgery, P < .001). In the multivariable Cox analysis, surgical resection and chemotherapy were significantly associated with longer survival, and advanced tumor stage, lower baseline serum albumin level, and greater comorbidity were found to significantly predict poor survival. Age was not associated with survival in individuals with BTC (P = .33).
  
  
  CONCLUSIONS
  Older age was not associated with poor survival in BTC, and treated individuals had longer survival in the older BTC population. Therefore, treatment should not be restricted on the basis of age.
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea .
authors.forename: Ban S
authors.initials: BS
authors.lastname: Lee
authors.forename: Jin-Hyeok
authors.initials: JH
authors.lastname: Hwang
authors.forename: Sang H
authors.initials: SH
authors.lastname: Lee
authors.forename: Sang E
authors.initials: SE
authors.lastname: Jang
authors.forename: Dong-Won
authors.initials: DW
authors.lastname: Ahn
authors.forename: Dae W
authors.initials: DW
authors.lastname: Hwang
authors.forename: Jai Y
authors.initials: JY
authors.lastname: Cho
authors.forename: Yoo-Seok
authors.initials: YS
authors.lastname: Yoon
authors.forename: Ho-Seong
authors.initials: HS
authors.lastname: Han
authors.forename: Soyeon
authors.initials: S
authors.lastname: Ahn
mesh_terms: D000367:Age Factors; D000368:Aged; D001661:Biliary Tract Neoplasms / Q000401:mortality* / Q000628:therapy*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D015996:Survival Rate