Table 1.

Sex, neuter status, and age in 198 Norwich terrier dogs

	Affected	Unaffected	Unclear
Total number of dogs	26	169	3
Sex
Male	14	66	1
Female	12	101	2
Neuter status
Male neutered	5	12	0
Male entire	9	54	1
Female neutered	8	21	1
Female entire	4	80	1
Unknown	0	2	0
Age at the time of the study, y
Median	8.4	4.6	13
Mean ± SD	8.3 ± 3.1	5.3 ± 4.1	13.5 ± 6.2
Range	4.2–14.7	0.1–19.5	12.5–15.0

SD, standard deviation.