Abstract
Life expectancy of cats was calculated from 196 cats (115 female and 81 male) with known birth and death dates. Most of the cats were neutered during the first year of their life. Both natural death and euthanasia due to terminal illness were considered as a death event. All cats received regular veterinary medical care during their life.Gender had no effect on median survival of cats (male = 12.6 years; female = 13.1 years; p = 0.490). Therefore, combined data of male and female cats were used for the calculation of the life expectancy. The maximum survival time was 17.95 years in this group of cats. The age specific median residual lifetime (age in years/median residual lifetime in years) was 0.5/12.9, 1.5/12.3, 2.5/11.4, 3.5/10.5, 4.5/9.5, 5.5/8.5, 6.5/7.6, 7.5/6.7, 8.5/5.8, 9.5/5.0, 10.5/4.3, 11.5/3.6, 12.5/3.0, 13.5/2.3, 14.5/1.6, 15.5/0.9, 16.5/0.8, and 17.5/0.56. Mortality increased dramatically in cats after 9.7 years of age (95% CI: 8.8, 10.6 years). The results of this study suggest that earlier diagnostic or therapeutic intervention is warranted in cats beginning at 10 years of age. This study was supported by Hill's Pet Nutrition, Inc.
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