Table 3. Age at cancer diagnosis by sex and neuter status of the study population.

Comparison groups, n	Median age at cancer diagnosis, y	Mean age at cancer diagnosis, y	p
M: F (1,900: 1,552)	8.4: 9.0	8.3: 8.7	p <0.0001
CM: SF (1,452: 1,390)	8.9: 9.0	8.5: 8.9	p = 0.0002
IM: IF (446: 161)	7.9: 7.3	7.6: 7.3	p = 0.2800
CM: IM (1,452: 446)	8.9: 7.9	8.5: 7.6	p <0.0001
SF: IF (1,390: 161)	9.0: 7.3	8.9: 7.3	p <0.0001

CM = castrated male; F = female; I = intact; M = male; SF = spayed female; Neuter status was unavailable for 2 males and 1 female.