Table 2. Univariate and multivariate logistic regression analysis for the factors of incorrect diagnosis by CT.
| Variables | Univariate analysis | Multivariate analysis | |||||
|---|---|---|---|---|---|---|---|
| RR | 95% CI | P value | RR | 95% CI | P value | ||
| Age (years) | 0.978 | 0.944–1.013 | 0.211 | – | – | – | |
| Sex (male vs. female) | 3.038 | 1.362–6.779 | 0.007 | 2.252 | 0.535–9.490 | 0.269 | |
| Clinical symptom (yes vs. no) | 1.021 | 0.454–2.293 | 0.960 | – | – | – | |
| Autoimmune disease (yes vs. no) | 11.317 | 1.363–93.990 | 0.025 | 11.538 | 0.795–167.520 | 0.073 | |
| Cyst in other organs (yes vs. no) | 0.687 | 0.430–3.600 | 1.244 | – | – | – | |
| X-ray positive (yes vs. no) | 0.359 | 0.157–0.822 | 0.015 | 0.788 | 0.142–4.376 | 0.786 | |
| Location (middle vs. lateral) | 11.400 | 2.443–53.188 | 0.002 | 2.458 | 0.380–15.912 | 0.345 | |
| Diameter (cm) (≤3 vs. >3 cm) | 6.849 | 2.950–15.873 | <0.001 | 4.525 | 1.027–20.000 | 0.046 | |
| Shape of the cyst (oval vs. irregular) | 1.415 | 0.562–3.564 | 0.461 | – | – | – | |
| Margin (clear vs. unclear) | 1.859 | 0.298–11.597 | 0.507 | – | – | – | |
| Unenhanced CT value (>20 vs. ≤20 Hu) | 12.593 | 3.903–40.629 | <0.001 | 7.043 | 1.750–28.345 | 0.006 | |
RR, risk ratio; CI, confidence interval; Hu, Hounsfield unit; CT, computerized tomography.