Table 4.
Univariate analysis of clinical signs associated with hyperthyroidism (total thyroxine [tT4] >50 nmol/l or tT4 between 30 and 50 nmol/l with thyroid-stimulating hormone <0.03 ng/ml and free T4 >50 pmol/l)
| Hyperthyroid cats |
|||||
|---|---|---|---|---|---|
| Variable | Category | N | n | % | P value* |
| Weight loss | Yes | 95 | 12 | 13 | 0.013 |
| No | 207 | 9 | 4 | ||
| Polyphagia | Yes | 46 | 3 | 7 | 1.00 |
| No | 256 | 18 | 7 | ||
| Heart rate (bpm) | <200 | 193 | 6 | 3 | 0.001 |
| 200–240 | 99 | 12 | 12 | ||
| >240 | 10 | 3 | 30 | ||
| Cardiac murmur | Yes | 16 | 3 | 19 | 0.090 |
| No | 286 | 18 | 6 | ||
| Respiratory rate and pattern | Normal | 277 | 17 | 6 | 0.042 |
| Increased | 23 | 3 | 13 | ||
| Dyspnoeic | 2 | 1 | 50 | ||
| Vomiting | Yes | 75 | 7 | 9 | 0.431 |
| No | 227 | 14 | 6 | ||
| Diarrhoea | Yes | 12 | 2 | 17 | 0.199 |
| No | 290 | 19 | 7 | ||
*
P value for two-tailed Fisher’s exact test
bpm = beats per minute