title: Age-specific survival after Hodgkin's disease in a population-based cohort (United States).
abstract: OBJECTIVE
  To examine risk factors for disease-specific survival in young and older adults diagnosed with Hodgkin's disease (HD) in a representative case series of adequate size for detecting effect modification by age group.
  
  
  METHODS
  For 5630 young adults (ages 15-44) and 2424 older adults (ages 45 and older) diagnosed with HD and reported to the population-based Surveillance, Epidemiology, and End Results program of the National Cancer Institute between 1983 and 1995, Kaplan-Meier survival curves were constructed and Cox proportional hazards regression used to evaluate the influences of age, sex, race/ethnicity, histologic subtype, Ann Arbor stage at diagnosis, and calendar year on hazard of disease-specific death.
  
  
  RESULTS
  The effects of most previously studied risk factors for HD death were different for young and older adults. Age was not associated with disease-specific survival in young adults, but in older adults, 1-year increases in age elevated the relative hazard of HD death by 4 6%. Male sex was related to outcome in young but not older adults, and Ann Arbor stage and B-symptom status exhibited markedly different relationships to survival by age. Older adult patients with and without B-symptoms had different hazards of mortality and had to be assessed separately.
  
  
  CONCLUSIONS
  Factors associated with disease-specific survival were different for young and older adults with HD. These findings provide further support for two etiologically and clinically distinct disease entities.
authors.affiliation: Surveillance Research, Northern California Cancer Center, Union City, CA 94587, USA. tclarke@nccc.org
authors.forename: C A
authors.initials: CA
authors.lastname: Clarke
authors.forename: S L
authors.initials: SL
authors.lastname: Glaser
authors.forename: A W
authors.initials: AW
authors.lastname: Prehn
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D003710:Demography; D005260:Female; D006689:Hodgkin Disease / Q000453:epidemiology* / Q000401:mortality; D006801:Humans; D008297:Male; D008875:Middle Aged; D018426:SEER Program; D016896:Treatment Outcome; D014481:United States / Q000453:epidemiology