Table 5.
In‐house diagnostic tests performance compared to reference quantitative bacterial culture at Sund Vet Diagnostik.
| Microscopy (n = 121) | Culture (n = 62) | |||
|---|---|---|---|---|
| Bacteriuria | Pyuria | Bacteriuria, pyuria, or both | Growth/no growth | |
| Sensitivity |
0.70 (47/(47 + 20)) [0.58;0.67] |
0.61 (41/(41 + 26)) [0.49;0.73] |
0.84 (56/(56 + 11)) [0.73;0.92] |
0.97 (31/(31 + 1)) [0.84;1.00] |
| Specificity |
0.57 (31/(31 + 23)) [0.43;0.71] |
0.48 (26/(26 + 28)) [0.34;0.62] |
0.39 (21/(21 + 33)) [0.26;0.53] |
0.57 (17/(17 + 13)) [0.37;0.75] |
| LR+ | 1.65 [1.16;2.33] | 1.18 [0.86;1.63] | 1.37 [1.08; 1.73] | 2.24 [1.48;3.38] |
| LR− | 0.52 [0.34;0.80] | 0.81 [0.54;1.21] | 0.42 [0.22;0.80] | 0.06 [0.01;0.39] |
| Accuracy | 64.5% | 55.4% | 63.6% | 77% |
LR+/LR−, positive and negative likelihood ratio; QBC, quantitative bacterial culture.
Calculated sensitivity, specificity, likelihood ratios and overall accuracy of in‐house diagnostic results from veterinary practice compared to reference QBC. Brackets are proportions and 95% confidence intervals.