Table 3. Multivariate analysis of the CTC positive model with adjusted odds ratios and 95% CI.
| Risk factors | Exp (B) | 95% CI | P-value |
|---|---|---|---|
| Gender | |||
| Female | 1 | Reference | - |
| Male | 1.213 | 0.503–2.926 | 0.667 |
| Age | |||
| ≥ 60 | 1 | Reference | - |
| <60 | 1.051 | 0.483–2.286 | 0.899 |
| Smoking | 0.719 | ||
| Never | 1 | Reference | - |
| Ever | 1.492 | 0.515–4.324 | 0.461 |
| Current | 1.019 | 0.393–2.641 | 0.969 |
| Clinical-staging | 0.058 | ||
| I-IIIA | 1 | Reference | - |
| IIIB- IV | 2.745 | 1.036–7.270 | 0.042 |
| Histology | |||
| ADC* | 1 | Reference | - |
| SCC* | 0.409 | 0.144–1.166 | 0.095 |
| OC* | 3.162 | 0.525–19.043 | 0.209 |
| Location of tumor | |||
| Center | 1 | Reference | - |
| Peripheral | 0.727 | 0.309–1.710 | 0.466 |
ADC*: adenocarcinoma.
SCC*: squamous cell carcinoma.
OC*: other carcinomas, including large cell, mixed cell carcinoma, or undifferentiated carcinoma.