Table 4.
Univariable logistic regression analyses of associations between factors and surgical difficulty level.
| Low level (n = 86) | High level (n = 36) | OR (95% CI) | P-value | |
|---|---|---|---|---|
| Age (years) | 59.3 ± 10.7 | 56.6 ± 11.1 | 0.977 (0.943, 1.013) | 0.215 |
| Sex | 0.001 | |||
| M | 50 | 33 | 1 (reference) | |
| F | 36 | 3 | 0.126 (0.036, 0.444) | |
| BMI (kg/m2) | 23.4 ± 2.7 | 25.5 ± 3.0 | 1.331 (1.130, 1.569) | 0.001 |
| CEA level | 0.995 | |||
| ≤5 ng/ml | 55 | 23 | 1 (reference) | |
| >5 ng/ml | 31 | 13 | 1.003 (0.446, 2.254) | |
| CA19-9 level | 0.935 | |||
| ≤37 U/ml | 76 | 32 | 1 (reference) | |
| >37 U/ml | 10 | 4 | 0.950 (0.277, 3.253) | |
| Operation history | 0.040 | |||
| No | 58 | 31 | 1 (reference) | |
| Yes | 28 | 5 | 0.334 (0.117, 0.952) | |
| Neoadjuvant chemoradiotherapy | 0.260 | |||
| No | 76 | 29 | 1 (reference) | |
| Yes | 10 | 7 | 1.834 (0.638, 5.276) | |
| Tumor location | 0.837 | |||
| Middle | 66 | 27 | 1 (reference) | |
| Low | 20 | 9 | 1.100 (0.445, 2.720) | |
| Pathological T stage | 0.294 | |||
| ≤T2 | 35 | 11 | 1 (reference) | |
| ≥T3 | 51 | 25 | 1.560 (0.680, 3.575) | |
| Pathological N stage | 0.178 | |||
| Negative | 45 | 14 | 1 (reference) | |
| Positive | 41 | 22 | 1.725 (0.781, 3.810) | |
| Differentiation | 0.257 | |||
| Well–moderate | 72 | 33 | 1 (reference) | |
| Poor | 14 | 3 | 0.468 (0.126, 1.738) | |
| Perineural invasion | 0.870 | |||
| Negative | 61 | 25 | 1 (reference) | |
| Positive | 25 | 11 | 1.074 (0.460, 2.507) | |
| Tumor budding | ||||
| Bd 1 | 72 | 28 | 1 (reference) | |
| Bd 2 | 8 | 6 | 1.929 (0.614, 6.060) | 0.261 |
| Bd 3 | 6 | 2 | 0.857 (0.163, 4.503) | 0.855 |
| Lymphovascular invasion | 0.059 | |||
| Negative | 69 | 23 | 1 (reference) | |
| Positive | 17 | 13 | 2.294 (0.968, 5.436) | |
| Tumor deposit | 0.641 | |||
| Negative | 61 | 24 | 1 (reference) | |
| Positive | 25 | 12 | 1.220 (0.529, 2.811) | |
| Tumor size (mm) | 25.0 ± 4.1 | 25.5 ± 3.0 | 1.029 (0.930, 1.137) | 0.582 |
| Pelvic inlet | 80.6 ± 8.7 | 86.5 ± 11.2 | 1.066 (1.020, 1.114) | 0.004 |
| Pelvic depth | 123.7 ± 13.8 | 131.0 ± 13.8 | 1.039 (1.006, 1.071) | 0.011 |
| Pelvic outlet | 118.9 ± 12.0 | 116.2 ± 10.3 | 0.980 (0.947, 1.014) | 0.238 |
| Transverse diameter | 129.5 ± 7.8 | 126.1 ± 8.3 | 0.947 (0.900, 0.996) | 0.034 |
| Interspinous distance | 100.5 ± 10.1 | 95.0 ± 8.3 | 0.938 (0.896, 0.982) | 0.006 |
| Intertuberous distance | 117.3 ± 12.8 | 108.3 ± 11.1 | 0.941 (0.908, 0.975) | 0.001 |
OR, odds ratio.
The bold values P-value <0.05.