Table 1 Clinical characteristics of the participants.
| Â | Non-RAIR group | RAIR group | P value |
|---|---|---|---|
(n = 14) | (n = 20) | ||
Sex | 0.868 | ||
 Male | 6 | 8 |  |
 Female | 8 | 12 | |
Age | 0.726 | ||
 < 55 y | 9 | 14 |  |
 ≥ 55 y | 5 | 6 |  |
Number of tumors | 0.999 | ||
 1 | 4 | 6 |  |
 ≥ 2 | 10 | 14 |  |
Capsule invasion | 0.999 | ||
 Yes | 13 | 18 |  |
 No | 1 | 2 |  |
Extra-glandular invasion | 0.999 | ||
 Yes | 10 | 15 |  |
 No | 4 | 5 |  |
Lymph-node metastasis | 0.283 | ||
 Yes | 11 | 19 |  |
 No | 3 | 1 |  |
Number of lymph node metastasis | 0.228 | ||
 < 5 | 5 | 3 |  |
 ≥ 5 | 9 | 17 |  |
TNM stage | 0.458 | ||
 I–II stage | 8 | 15 |  |
 III–IV stage | 6 | 5 |  |
