Table 1

Description of population of Rottweilers included in a historical cohort study of bone sarcoma risk

No. of dogs683
No. of households402
Residence
 United States (45 states)648 (94.9%)
 Canada 35 (5.1%)
Status at time of questionnaire
 Alive55%
 Deceased45%
Follow-up duration (mean; range)
 Dogs with bone sarcoma8.8 (1.3–13.2) yr
 Dogs without bone sarcoma8.6 (1.7–15.6) yr
Age at Death (mean± SD)
 Intact male9.3 ± 2.5 yr
 Castrated male9.2 ± 2.5 yr
 Intact female7.5 ± 2.4 yr
 Spayed female9.8 ± 2.4 yr
 Dogs with bone sarcoma8.8 ± 2.0 yr
 Dogs without bone sarcoma9.5 ± 2.6 yr
Appendicular bone sarcoma
 Age at diagnosis (median; range)8.0 (1.3–13.0) yr
  Intact male8.0 (5.0–12.0) yr
  Castrated male8.0 (5.0–13.0) yr
  Intact female7.5 (4.0–9.0) yr
  Spayed female9.0 (1.3–11.0) yr
 Skeletal location
  Proximal humerus32 (37.2%)
  Distal radius16 (18.6%)
  Distal femur10 (11.6%)
  Distal tibia 9 (10.5%)
  Other19 (22.1%)
Cause of death (% of 305 deaths)
 Cancer64.3%
 Gastrointestinal disease 7.2%
 Neurological disease 4.3%
 Cardiovascular disease 3.9%
 Old age 3.6%
 Osteoarthritis 3.3%
 Renal disease 2.6%
 Endocrine disease 2.6%
 Other 3.0%
 Unknown 5.2%