Table 2.
Demographic, clinical and pathological characteristics of patients by extent of lymph node metastasis after PSM.
| Variables | Overall (%) | N0 (%) | N1a (%) | N1b (%) | P |
|---|---|---|---|---|---|
| (N=1086) | (N=362) | (N=362) | (N=362) | ||
| Gender | 0.098 | ||||
| Female | 791(72.8) | 278 (76.8) | 260 (71.8) | 253 (69.9) | |
| Male | 295(27.2) | 84 (23.2) | 102 (28.2) | 109 (30.1) | |
| Age (year) | 0.993 | ||||
| <55 | 928(85.5) | 309 (85.4) | 309 (85.4) | 310 (85.6) | |
| ≥55 | 158(14.5) | 53 (14.6) | 53 (14.6) | 52 (14.4) | |
| T stage | 0.932 | ||||
| T1a | 508(46.8) | 167 (46.1) | 169 (46.7) | 172 (47.5) | |
| T1b | 578(53.2) | 195 (53.9) | 193 (53.3) | 190 (52.5) | |
| PLN | <0.001 | ||||
| Mean (SD) | 3.47(4.87) | 0 (0) | 2.48 (2.10) | 7.91 (5.84) | |
| LNPR | <0.001 | ||||
| Mean (SD) | 0.29(0.32) | 0 (0) | 0.58 (0.31) | 0.29 (0.19) | |
| Capsular invasion | 0.326 | ||||
| Yes | 36(3.3) | 8 (2.2) | 13 (3.6) | 15 (4.1) | |
| No | 1050(96.7) | 354 (97.8) | 349 (96.4) | 347 (95.9) | |
| Hashimoto thyroiditis | 0.864 | ||||
| Yes | 171(15.7) | 54 (14.9) | 59 (16.3) | 58 (16.0) | |
| No | 915(84.3) | 308 (85.1) | 303 (83.7) | 304 (84.0) | |
| Multi-focus | 0.514 | ||||
| Yes | 165(15.2) | 56 (15.5) | 49 (13.5) | 60 (16.6) | |
| No | 921(84.8) | 306 (84.5) | 313 (86.5) | 302 (83.4) | |
| Follow-up (month) | 0.917 | ||||
| Mean (SD) | 69.18(38.35) | 69.43(38.01) | 68.51(39.07) | 69.61 (38.05) | |
| Follow-up (state) | <0.001 | ||||
| Recurrence | 81(7.5) | 9 (2.5) | 35 (9.7) | 37 (10.2) | |
| RT | 18(22.22) | 7(78.77) | 7(20.00) | 4(10.81) | |
| LN | 34(41.98) | 1(11.11) | 19(54.29) | 14(37.84) | |
| RT+LN | 29(35.80) | 1(11.11) | 9(25.71) | 19(51.35) | |
| No recurrence | 1005(92.5) | 353 (97.5) | 327 (90.3) | 325 (89.8) |
PLN, positive lymph node; LNPR, lymph node positive ratio; RT, residual thyroid; LN, lymph node.