Table 1.
Demographic, clinical and pathological characteristics of patients by extent of lymph node metastasis.
| Variables | Overall (%) | N0 (%) | N1a (%) | N1b (%) | P |
|---|---|---|---|---|---|
| (N=2785) | (N=1327) | (N=986) | (N=472) | ||
| Gender | <0.001 | ||||
| Female | 2110(75.8) | 1073 (80.9) | 704 (71.4) | 333 (70.6) | |
| Male | 675(24.2) | 254 (19.1) | 282 (28.6) | 139 (29.4) | |
| Age (year) | <0.001 | ||||
| <55 | 2351(84.4) | 1080 (81.4) | 863 (87.5) | 408 (86.4) | |
| ≥55 | 434(15.6) | 247 (18.6) | 123 (12.5) | 64 (13.6) | |
| T stage | <0.001 | ||||
| T1a | 1948(69.9) | 1089 (82.1) | 656 (66.5) | 203 (43.0) | |
| T1b | 837(30.1) | 238 (17.9) | 330 (33.5) | 269 (57.0) | |
| PLN | <0.001 | ||||
| Mean (SD) | 2.21(3.82) | 0 (0) | 2.40 (1.92) | 8.04 (5.53) | |
| LNPR | <0.001 | ||||
| Mean (SD) | 0.26(0.33) | 0 (0) | 0.59 (0.30) | 0.30 (0.19) | |
| Capsular invasion | <0.001 | ||||
| Yes | 47(1.7) | 9 (0.7) | 18 (1.8) | 20 (4.2) | |
| No | 2738(98.3) | 1318 (99.3) | 968 (98.2) | 452 (95.8) | |
| Hashimoto thyroiditis | <0.001 | ||||
| Yes | 529(19.0) | 294 (22.2) | 165 (16.7) | 70 (14.8) | |
| No | 2256(81.0) | 1033 (77.8) | 821 (83.3) | 402 (85.2) | |
| Multi-focus | <0.001 | ||||
| Yes | 338(12.1) | 135 (10.2) | 121 (12.3) | 82 (17.4) | |
| No | 2447(87.9) | 1192 (89.8) | 865 (87.7) | 390 (82.6) | |
| Follow-up (month) | <0.001 | ||||
| Mean (SD) | 69.25(44.12) | 67.01 (39.06) | 66.49 (48.27) | 81.31(46.52) | |
| Follow-up (state) | <0.001 | ||||
| Recurrence | 167(6.0) | 29 (2.2) | 85 (8.6) | 53 (11.2) | |
| RT | 51(30.54) | 23(79.31) | 24(28.24) | 4(7.55) | |
| LN | 66(39.52) | 4(13.79) | 42(49.41) | 20(37.74) | |
| RT+LN | 50(29.94) | 2(6.90) | 19(22.35) | 29(54.72) | |
| No recurrence | 2618(94.0) | 1298 (97.8) | 901 (91.4) | 419 (88.8) |
PLN, positive lymph node; LNPR, lymph node positive ratio; RT, residual thyroid; LN, lymph node.