Table 5

Univariate analysis of reproductive risk factors of appendicular bone sarcoma in a cohort of 275 female Rottweiler dogs

Risk factorDogs with bone sarcomaDogs without bone sarcomaP
Total no.28 dogs247 dogs
Pregnancy0.22
 Yes11 dogs127 dogs
 No17 dogs120 dogs
Duration of reproductive activitya2.6 ± 1.5 yr2.5 ± 1.5 yr0.97
No. of litters2.0 ± 0.9 litters2.1 ± 1.1 litters0.79
No. of live births10.2 ± 6.5 puppies11.9 ± 9.1 puppies0.54
Age at first pregnancy3.4 ± 1.2 yr3.6 ± 1.1 yr0.47
  • a Duration of reproductive activity = total number of years during which she was bred.