Fig. 2
From: Long-term assessment of risk factors for canine tumors registered in Xi’an, China
Epidemiological risk of breast tumors in pet dogs by age and breed. a Proportion of different types of tumors in pet dogs’ reproductive system. b Dynamic changes of breast tumors incidence in pet dogs from 2009 to 2018. The dotted line stands for linear regression. c Proportion of different breeds of pet dog with breast tumors. d Incidence of breast tumors at different ages. e Incidence of breast tumors at different ages in Pekingese