title: Incidence of and survival after mammary tumors in a population of over 80,000 insured female dogs in Sweden from 1995 to 2002.
abstract: The main objective of this study was to describe the incidence of mammary tumors (MTs) and the survival after MTs, in female dogs between 3 and 10 years of age (insured for veterinary care and with life insurance in a Swedish animal-insurance company) from 1995 to 2002. Measures of incidence are presented crudely, by breed and across age categories and birth cohorts (1991-1998). The survivals until MT diagnosis and after a MT diagnosis were computed. The overall incidence for any MT claim was 111 dogs per 10,000 dog-years at risk (DYAR). The overall MT rate in the 1992 and 1993 birth cohorts was 154 dogs per 10,000 DYAR. The incidence for any MT claim increased with age and varied by breed, from 319 dogs per 10,000 DYAR in the English springer spaniel to 5 dogs per 10,000 DYAR in the rough-haired collie. At the ages 6, 8 and 10 years, 1%, 6% and 13% respectively, of all females had at least one MT claim. The MT mortality was 6 deaths per 10,000 DYAR and increased with age. The overall-case fatality was 6%.
authors.affiliation: Department of Clinical Sciences, Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden.
authors.forename: Agneta
authors.initials: A
authors.lastname: Egenvall
authors.forename: Brenda N
authors.initials: BN
authors.lastname: Bonnett
authors.forename: Patrik
authors.initials: P
authors.lastname: Ohagen
authors.forename: Pekka
authors.initials: P
authors.lastname: Olson
authors.forename: Ake
authors.initials: A
authors.lastname: Hedhammar
authors.forename: Henrik
authors.initials: H
authors.lastname: von Euler
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000453:epidemiology* / Q000209:etiology / Q000401:mortality; D004285:Dogs; D005260:Female; D015994:Incidence; D007345:Insurance Claim Review; D008137:Longitudinal Studies; D015674:Mammary Neoplasms, Animal / Q000453:epidemiology* / Q000209:etiology / Q000401:mortality; D010375:Pedigree; D012044:Regression Analysis; D012307:Risk Factors; D016019:Survival Analysis; D013548:Sweden / Q000453:epidemiology