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Table 1

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

No. of dogs 683 
No. of households 402 
Residence  
 United States (45 states) 648 (94.9%) 
 Canada  35 (5.1%) 
Status at time of questionnaire  
 Alive 55% 
 Deceased 45% 
Follow-up duration (mean; range)  
 Dogs with bone sarcoma 8.8 (1.3–13.2) yr 
 Dogs without bone sarcoma 8.6 (1.7–15.6) yr 
Age at Death (mean± SD)  
 Intact male 9.3 ± 2.5 yr 
 Castrated male 9.2 ± 2.5 yr 
 Intact female 7.5 ± 2.4 yr 
 Spayed female 9.8 ± 2.4 yr 
 Dogs with bone sarcoma 8.8 ± 2.0 yr 
 Dogs without bone sarcoma 9.5 ± 2.6 yr 
Appendicular bone sarcoma  
 Age at diagnosis (median; range) 8.0 (1.3–13.0) yr 
  Intact male 8.0 (5.0–12.0) yr 
  Castrated male 8.0 (5.0–13.0) yr 
  Intact female 7.5 (4.0–9.0) yr 
  Spayed female 9.0 (1.3–11.0) yr 
 Skeletal location  
  Proximal humerus 32 (37.2%) 
  Distal radius 16 (18.6%) 
  Distal femur 10 (11.6%) 
  Distal tibia  9 (10.5%) 
  Other 19 (22.1%) 
Cause of death (% of 305 deaths)  
 Cancer 64.3% 
 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% 
No. of dogs 683 
No. of households 402 
Residence  
 United States (45 states) 648 (94.9%) 
 Canada  35 (5.1%) 
Status at time of questionnaire  
 Alive 55% 
 Deceased 45% 
Follow-up duration (mean; range)  
 Dogs with bone sarcoma 8.8 (1.3–13.2) yr 
 Dogs without bone sarcoma 8.6 (1.7–15.6) yr 
Age at Death (mean± SD)  
 Intact male 9.3 ± 2.5 yr 
 Castrated male 9.2 ± 2.5 yr 
 Intact female 7.5 ± 2.4 yr 
 Spayed female 9.8 ± 2.4 yr 
 Dogs with bone sarcoma 8.8 ± 2.0 yr 
 Dogs without bone sarcoma 9.5 ± 2.6 yr 
Appendicular bone sarcoma  
 Age at diagnosis (median; range) 8.0 (1.3–13.0) yr 
  Intact male 8.0 (5.0–12.0) yr 
  Castrated male 8.0 (5.0–13.0) yr 
  Intact female 7.5 (4.0–9.0) yr 
  Spayed female 9.0 (1.3–11.0) yr 
 Skeletal location  
  Proximal humerus 32 (37.2%) 
  Distal radius 16 (18.6%) 
  Distal femur 10 (11.6%) 
  Distal tibia  9 (10.5%) 
  Other 19 (22.1%) 
Cause of death (% of 305 deaths)  
 Cancer 64.3% 
 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% 
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