Table 1.
Patient characteristics
| No ASI (n = 87) | ASI (n = 36) | P value | |
|---|---|---|---|
| Patient factors | |||
| Age (average) | 64 | 66 | .39 |
| Sex, male, % (n) | 78% (68) | 89% (32) | .26 |
| Current smoker | 16% (14) | 25% (9) | .37 |
| Disease factors | |||
| Hypertension | 40% (35) | 94% (34) | <.01 |
| Diabetes | 16% (14) | 47% (17) | <.01 |
| COPD | 3% (3) | 3% (1) | 1 |
| Cardiac disease (CAD, arrhythmia, valvular) | 21% (18) | 22% (8) | 1 |
| Other malignancies | 18% (16) | 17% (6) | 1 |
| Tumor location | - | - | .86 |
| Cervical/upper | 3% (3) | 6% (2) | |
| Mid | 9% (8) | 8% (3) | |
| Distal | 87% (76) | 86% (31) | |
| Clinical stage | .12 | ||
| I | 11% (10) | 14% (5) | 1 |
| II | 8% (7) | 19% (7) | .18 |
| III | 55% (48) | 61% (22) | 1 |
| IV | 18% (16) | 6% (2) | .09 |
| Pathological stage | .38 | ||
| I | 35% (31) | 47% (17) | .32 |
| II | 25% (22) | 22% (8) | .90 |
| III | 33% (29) | 31% (11) | .93 |
| IV | 6% (5) | 0 | .33 |
| Pathology, adenocarcinoma, % (n) | 1 | ||
| Adenocarcinoma | 91% (79) | 89% (32) | |
| Squamous cell carcinoma | 9% (8) | 11% (4) | |
| Positive margins | 10% (9) | 0 | .10 |
| Treatment factors | |||
| Surgical approach, laparoscopic, % (n) | 43% (37) | 28% (10) | .15 |
| Neoadjuvant therapy | 74% (64) | 75% (27) | 1 |
| Adjuvant chemotherapy | 16% (14) | 19% (7) | .85 |
| Adjuvant radiation | 8% (7) | 8% (3) | 1 |
CAD, coronary artery disease; COPD, chronic obstructive pulmonary disease.