Table 3 Patients’ characteristics, surgical and pathological information of salvage group
Tumor detected (n = 25) | No tumor detected (n = 8) | P-value | |
|---|---|---|---|
Age, median (range), years | 46 (32–74) | 38.5 (33–66) | 0.159 |
Male, N (%) | 14 (56.0) | 8 (100.0) | 0.062 |
BMI, mean (SD) | 25.5 (3.0) | 25.1 (2.6) | 0.703 |
Symptomatic, N (%) | 10 (40.0) | 3 (37.5) | 1.000 |
CA242, median (range), U/ml | 6.7 (0.3–31.5) | 4.3 (0.7–22.1) | 0.141 |
CEA, median (range), ng/ml | 1.6 (0.2–4.4) | 2.1 (1.3–3.9) | 0.274 |
CA19-9, median (range), U/ml | 10.5 (0.6–34.0) | 7.5 (0.6–22.5) | 0.179 |
Primary tumor size, cm | |||
< 1 cm, N (%) | 23 (92.0) | 8 (100.0) | 1.000 |
1–2 cm, N (%) | 2 (8.0) | 0 (0.0) | |
Distance from anal verge, cm | |||
≤ 6 cm, N (%) | 16 (64.0) | 6 (75.0) | 0.886 |
> 6 cm, N (%) | 9 (36.0) | 2 (25.0) | |
Location, N (%) | |||
Anterior | 11 (44.0) | 2 (25.0) | 0.516 |
Posterior | 5 (20.0) | 3 (37.5) | |
Lateral | 9 (36.0) | 3 (37.5) | |
Operative time, median (range), minutes | 60 (25–130) | 67.5 (50–120) | 0.526 |
Blood loss, ml | |||
≤ 5 ml, N (%) | 24 (96.0) | 7 (87.5) | 0.979 |
> 5 ml, N (%) | 1 (4.0) | 1 (12.5) | |
Postoperative hospital stay, median (range), days | 2 (1–3) | 2 (1–3) | 0.703 |
Grade, N (%) | |||
G1 | 19 (76.0) | 7 (87.5) | 0.845 |
G2 | 6 (24.0) | 1 (12.5) | |
Invasion depth, N (%) | |||
Mucosa | 11 (44.0) | 1 (12.5) | 0.234 |
Submucosa | 14 (56.0) | 7 (87.5) | |
Negative resection margin, N (%) | 25 (100.0) | 8 (100.0) | – |