Table 2. Descriptive analysis of groups of DTC patients with and without NSSPM.
| Baseline variables | With NSSPM (n = 17) | Without NSSPM (n = 396) | P value |
|---|---|---|---|
| Age at diagnosis of DTC (years) | 52 (±12) | 44 (±15) | 0.02* |
| Mean (±SD) | |||
| Gender | |||
| Female | 14 (82.4%) | 348 (87.9%) | 0.35 |
| Male | 3 (27.6%) | 48 (12.1%) | |
| Histological type | |||
| Papillary | 13 (76.5%) | 306 (77.3%) | 0.56 |
| Follicular | 4 (23.5%) | 90 (22.7%) | |
| RAI-131 | 13 (76.5%) | 239 (60.4%) | 0.18 |
| I-131 cumulative activity (mCi) | 150 (800) | 150 (1400) | 0.78 |
| Follow-up period since diagnosis of DTC (years) | 5.3 (37.1) | 9.0 (26.2) | 0.07 |
Values are represented by mean (±SD), number of patients (%) or median (range).
DTC: differentiated thyroid carcinoma; RAI-131: I131 radioactive iodine treatment; NSSPM: non-synchronous second primary malignancy.
* Statistically significant p < 0.05.