Table 1.
Clinicopathologic information of the patients included in the study
| Characteristics | Nonrecurrence |
Recurrence |
P valuea | |||
|---|---|---|---|---|---|---|
|
n
|
% |
n
|
% |
|||
| 16 | 48% | 17 | 52% | |||
|
| ||||||
| Histology | Adenocarcinoma | 12 | 36% | 11 | 33% | .708 |
| Squamous cell carcinoma | 4 | 12% | 6 | 18% | ||
| Age (y) | Mean | 70 (53–84) | 69 (48–80) | .742b | ||
| Sex | Female | 8 | 24% | 8 | 24% | >.999 |
| Male | 8 | 24% | 9 | 27% | ||
| Race or ethnicity | African American | 1 | 3% | 1 | 3% | .615 |
| Asian | 0 | 0% | 1 | 3% | ||
| White | 15 | 45% | 15 | 45% | ||
| Smoking history | Current | 2 | 6% | 4 | 12% | .616 |
| Former | 12 | 36% | 12 | 36% | ||
| Never | 2 | 6% | 1 | 3% | ||
| Pack/y | Mean | 39 (0–120) | 41 (0–90) | .6244b | ||
| Tumor size (cm) | Mean | 2.43 (1.5–3.5) | 2.65 (1.5–4) | >.999 | ||
| <3 cm | 11 | 33% | 11 | 33% | ||
| ≥3 cm | 5 | 15% | 6 | 18% | ||
| Pleural involvement | No | 10 | 30% | 11 | 33% | >.999 |
| Yes | 6 | 18% | 6 | 18% | ||
| Pathologic stage | IA | 8 | 24% | 8 | 24% | >.999 |
| IB | 8 | 24% | 9 | 27% | ||
| Pathologic T | T1a | 4 | 12% | 3 | 9% | .834 |
| T1b | 5 | 15% | 5 | 15% | ||
| T2a | 7 | 21% | 9 | 27% | ||
| Pathologic N | N0 | 16 | 48% | 17 | 52% | >.999 |
| N1-N3 | 0 | 0% | 0 | 0% | ||
| Resection margin status | R0 | 16 | 48% | 17 | 52% | >.999 |
| R1-R2 | 0 | 0% | 0 | 0% | ||
a
Fisher exact test.
b
For continuous variables, the Mann—Whitney test was used.