Table 3.
Tumor extent and cancer prognosis according to preoperative serum calcitonin levels.
| Calcitonin Category | Preoperative Serum Calcitonin (pg/mL) | Number of Patients | Primary Tumor Size | Number of LNMs | ||
|---|---|---|---|---|---|---|
| Mean | 95% CI | Mean | 95% CI | |||
| 1 | 1–20 | 22 | 0.61 | 0.36–0.86 | 0.32 | 0–0.82 |
| 2 | 20.1–100 | 22 | 0.81 | 0.67–0.96 | 0.41 | 0–1.26 |
| 3 | 100.1–200 | 18 | 1.59 | 1.03–2.16 | 1.61 | 0–3.56 |
| 4 | 200.1–500 | 30 | 1.29 | 1.07–1.51 | 3.4 | 1.40–5.4 |
| 5 | 500.1–1000 | 24 | 1.89 | 1.50–2.29 | 7.17 | 2.96–11.35 |
| 6 | 1000.1–2000 | 18 | 2.36 | 1.93–2.78 | 5.56 | 2.47–8.64 |
| 7 | 2000.1–7000 | 22 | 3.17 | 2.66–3.68 | 10.23 | 4.46–16.0 |
| 8 | More than 7000 | 14 | 4.09 | 2.57–5.60 | 13.36 | 6.36–20.38 |
| Total | 170 | 1.87 | 1.64–2.10 | 4.89 | 3.59–6.19 | |
LNM = lymph node metastasis; CI = confidence interval.