Variable | No. of dogs tested* | % normal hearing | % unilateral deafness | % bilateral deafnessa | Multilevel logistic model** | Logistic animal model*** | ||
---|---|---|---|---|---|---|---|---|
Odds ratio (95% CI)† | P-value | Odds ratio (95% CI)† | P-value | |||||
Sex | 0.044 | 0.059 | ||||||
Male | 381 | 91.1% | 5.8% | 3.1% | Reference category | Reference category | ||
Female | 417 | 86.8% | 9.1% | 4.1% | 1.7 (1.0 to 2.8) | 0.044 | 1.6 (1.0 to 2.6) | 0.057 |
Not recorded | 12 | 75.0% | 16.7% | 8.3% | ||||
Colour***** | 0.785 | 0.916 | ||||||
Red | 327 | 88.7% | 8.0% | 3.4% | Reference category | Reference category | ||
Blue | 137 | 87.6% | 7.3% | 5.1% | 1.2 (0.6 to 2.7) | 0.589 | 1.1 (0.5 to 2.3) | 0.824 |
Blue black tan | 319 | 88.7% | 7.5% | 3.8% | 0.8 (0.4 to 1.6) | 0.563 | 0.9 (0.5 to 1.7) | 0.775 |
Blue tan | 18 | 88.9% | 11.1% | 0.0% | 0.7 (0.1 to 4.1) | 0.723 | 0.6 (0.1 to 3.1) | 0.571 |
Red tan | 1 | 100.0% | 0.0% | 0.0% | ||||
Blue black | 6 | 100.0% | 0.0% | 0.0% | ||||
Blue mottled | 1 | 100.0% | 0.0% | 0.0% | ||||
Red mottled | 1 | 100.0% | 0.0% | 0.0% | ||||
Base colour | 0.882 | 0.885 | ||||||
Blue | 481 | 88.6% | 7.5% | 4.0% | Reference category | Reference category | ||
Red | 329 | 88.8% | 7.9% | 3.3% | 1.0 (0.6 to 1.9) | 0.882 | 1.0 (0.6 to 1.8) | 0.890 |
Blue black tan | 0.447 | 0.768 | ||||||
No | 491 | 88.6% | 7.7% | 3.7% | Reference category | Reference category | ||
Yes | 319 | 88.7% | 7.5% | 3.8% | 0.8 (0.4 to 1.5) | 0.447 | 0.9 (0.5 to 1.6) | 0.775 |
Blue black | ||||||||
No | 804 | 88.6% | 7.7% | 3.7% | NM | NM | ||
Yes | 6 | 100.0% | 0.0% | 0.0% | ||||
Blue tan | 0.688 | 0.951 | ||||||
No | 792 | 88.6% | 7.6% | 3.8% | Reference category | Reference category | ||
Yes | 18 | 88.9% | 11.1% | 0.0% | 1.4 (0.2 to 8.5) | 0.688 | 1.0 (0.2 to 4.7) | 0.954 |
Red tan | ||||||||
No | 809 | 88.6% | 7.7% | 3.7% | NM 2 | NM 2 | ||
Yes | 1 | 100.0% | 0.0% | 0.0% | ||||
Speckled | 0.609 | 0.726 | ||||||
No | 423 | 88.7% | 7.3% | 4.0% | Reference category | Reference category | ||
Yes | 387 | 88.6% | 8.0% | 3.4% | 1.2 (0.7 to 2.1) | 0.609 | 1.1 (0.6 to 1.9) | 0.733 |
Mottled | 0.507 | 0.589 | ||||||
No | 805 | 88.7% | 7.7% | 3.6% | Reference category | Reference category | ||
Yes | 5 | 80.0% | 0.0% | 20.0% | 2.4 (0.2 to 33.0) | 0.507 | 1.9 (0.2 to 20.8) | 0.593 |
Mask | 0.001 | **** | ||||||
No | 185 | 85.4% | 12.4% | 2.2% | Reference category | Reference category | ||
Left | 66 | 83.3% | 10.6% | 6.1% | 1.0 (0.4 to 2.4) | 0.992 | 1.0 (0.4 to 2.3) | 0.988 |
Right | 58 | 81.0% | 12.1% | 6.9% | 1.4 (0.6 to 3.3) | 0.455 | 1.2 (0.5 to 2.9) | 0.603 |
Bilateral | 229 | 95.6% | 3.1% | 1.3% | 0.2 (0.1 to 0.5) | 0.001 | 0.2 (0.1 to 0.5) | <0.001 |
Not recorded | 272 | 87.9% | 6.6% | 5.5% | ||||
Head spot | 0.767 | 0.911 | ||||||
No | 439 | 88.8% | 8.7% | 2.5% | Reference category | Reference category | ||
Yes | 99 | 89.9% | 6.1% | 4.0% | 0.9 (0.4 to 2.0) | 0.767 | 1.0 (0.5 to 2.0) | 0.916 |
Not recorded | 272 | 87.9% | 6.6% | 5.5% | ||||
Pigmented body spot | 0.034 | 0.043 | ||||||
None | 430 | 87.4% | 9.3% | 3.3% | Reference category | Reference category | ||
At least one | 104 | 95.2% | 3.8% | 1.0% | 0.3 (0.1 to 0.9) | 0.034 | 0.4 (0.1 to 1.0) | 0.041 |
Not recorded | 276 | 88.0% | 6.5% | 5.4% | ||||
White head/body patches | 0.852 | 0.933 | ||||||
No | 508 | 89.0% | 8.3% | 2.8% | Reference category | Reference category | ||
Yes | 27 | 88.9% | 7.4% | 3.7% | 1.1 (0.3 to 4.7) | 0.852 | 0.9 (0.3 to 3.5) | 0.937 |
Not recorded | 275 | 88.0% | 6.5% | 5.5% | ||||
Sire CHSD status | 0.085 | 0.205 | ||||||
Tested normal | 502 | 91.4% | 6.4% | 2.2% | Reference category | Reference category | ||
Unilateral deaf left ear | 10 | 70.0% | 20.0% | 10.0% | 5.9 (0.8 to 44.0) | 0.085 | 3.3 (0.5 to 21.1) | 0.200 |
Unknown | 298 | 84.6% | 9.4% | 6.0% | ||||
Dam CHSD status | 0.321 | 0.402 | ||||||
Normal | 430 | 88.6% | 8.4% | 3.0% | Reference category | Reference category | ||
Unilateral deaf right ear | 3 | 66.7% | 0.0% | 33.3% | 4.8 (0.2 to 105.5) | 0.321 | 3.4 (0.2 to 59.7) | 0.400 |
Unknown | 377 | 88.9% | 6.9% | 4.2% |