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Main factors predicting metastases in patients with rectal neuroendocrine tumors [30]
| Predictive factor | Odds ratio | 95% CI |
| Tumor size >14 mm | 57.5 | 23.3–1,002.6 |
| Mitotic index ≥2/10 HPF | 56.2 | 2.4–1,295.8 |
| Lymphovascular invasion | 65.1 | 1.1–3,846.7 |
| Muscularis propria invasion | 37.9 | 5.0–290 |
HPF = High-power field; CI = confidence interval.
