Table 3. Mean age of onset of clinical signs as described by owners and mean age at the time of diagnosis of PRA for different breeds of dogs.
| Breed | Number of animals | Age of onset (mean/years) | Age at diagnosis (mean/years) |
|---|---|---|---|
| UB | 27 | 8.85 ± 3.88 | 9.26 ± 3.79 |
| Toy Poodle | 26 | 9.05 ± 3.54 | 9.69 ± 4.17 |
| Cocker Spaniel | 19 | 9.39 ± 3.68 | 9.79 ± 3.60 |
| Lhasa Apso | 13 | 9.08 ± 3.25 | 10.15 ± 3.36 |
| Labrador Retriever | 9 | 6.78 ± 1.92 | 7.67 ± 1.58 |
| Pomeranian | 5 | 3.15 ± 3.99 | 3.35 ± 4.30 |
| Shih Tzu | 4 | 7.74 ± 2.06 | 8.00 ± 2.16 |
| Yorkshire Terrier | 4 | 5.38 ± 4.39 | 7.25 ± 4.03 |
| Dachshund | 4 | 9.75 ± 5.12 | 9.75 ± 5.12 |
| Maltese | 4 | 8.25 ± 3.30 | 8.75 ± 4.11 |
| Miniature Pinscher | 3 | 11.00 ± 2.65 | 11.00 ± 2.65 |
| American Pit Bull Terrier | 3 | 2.75 ± 3.70 | 5.00 ± 3.46 |
| Bichon Frisé | 2 | 9.50 ± 2.12 | 9.50 ± 2.12 |
| Brazilian Terrier | 2 | 15.00 ± 1.41 | 16.00 ± 0.00 |
| Beagle | 1 | 4 | 4 |
| Chow Chow | 1 | 13 | 13 |
| Pug | 1 | 7 | 9 |
| Miniature Schnauzer | 1 | 8 | 8 |
| Whippet | 1 | 4 | 4 |
| Total | 130 | 8.55 ± 3.92 | 9.06 ± 3.91 |