Table 4. Univariate analysis for factors associated with HMLN metastasis in 129 PET/CT negative patients.
| Variable | Pathologically positive | Pathologically negative | P-value |
|---|---|---|---|
| Sex | |||
| Male | 9 | 59 | |
| Female | 8 | 54 | 0.929 |
| Age | |||
| ≦65 | 14 | 75 | |
| >65 | 3 | 37 | 0.201 |
| Smoking status | |||
| Never smoker | 11 | 62 | |
| Smoker | 6 | 50 | 0.469 |
| Concurrent lung disease or diabetes | |||
| Yes | 8 | 9 | |
| Never | 9 | 103 | 0.000 |
| Location of the tumor | |||
| Central | 5 | 16 | |
| Non-central | 12 | 96 | 0.115 |
| Lobar distribution | |||
| Upper or middle lobe | 10 | 79 | |
| Lower lobe | 7 | 33 | 0.331 |
| Right or left lung distribution | |||
| Right lung | 8 | 78 | |
| Left lung | 9 | 34 | 0.066 |
| Histopathological type | |||
| Adenocarcinoma | 9 | 98 | |
| Non-adenocarcinoma | 8 | 14 | 0.000 |
| Differentiated degree | |||
| High | 1 | 25 | |
| Medium | 10 | 63 | |
| Lower | 6 | 24 | 0.200 |
| Pleural invasion | |||
| Yes | 11 | 46 | |
| No | 6 | 66 | 0.067 |
| Tumor size | |||
| ≦3cm | 10 | 81 | |
| >3cm | 7 | 31 | 0.255 |
| SUVmax of primary tumor | |||
| ≦4.0 | 3 | 58 | |
| >4.0 | 14 | 54 | 0.009 |