Table 2 Univariate analysis of risk factors for CLNM among PTC patients
Factors | CLNM– group (n=1604) | CLNM+ group (n=982) | P values |
|---|---|---|---|
Sex | Â | Â | <0.001 |
 Male | 284 (17.7%) | 281 (28.6%) |  |
 Female | 1320 (82.3%) | 701 (71.4%) |  |
Age (years) | 44.89±10.60 | 39.94±10.45 | <0.001 |
TD (cm) | Â | Â | <0.001 |
 ≤1 (T1a) | 1308 (81.5%) | 614 (62.5%) |  |
 >1 to ≤2 (T1b) | 245 (15.3%) | 289 (29.4%) |  |
 >2 < to ≤4 (T2) | 49 (3.1%) | 73 (7.4%) |  |
 >4 (T3) | 2 (0.1%) | 6 (0.6%) |  |
Tumor mulifocality | Â | Â | <0.001 |
 Single-focal | 1025 (63.9%) | 551 (56.1%) |  |
 Multifocal | 579 (36.1%) | 431 (43.9%) |  |
Capsular invasion | Â | Â | 0.010 |
 Yes | 158 (9.9%) | 129 (13.1%) |  |
 No | 1446 (90.1%) | 853 (86.9%) |  |
Nerve invasion | Â | Â | 0.228 |
 Yes | 38 (2.4%) | 31 (3.2%) |  |
 No | 1566 (97.6%) | 951 (96.8%) |  |
Vascular invasion | Â | Â | <0.001 |
 Yes | 25 (1.6%) | 85 (8.7%) |  |
 No | 1582 (98.6%) | 897 (91.3%) |  |
Number of lymph nodes in central region | 8.37±5.52 | 10.65±6.12 | <0.001 |
Thyroid function (uIU/ML) | Â | Â | Â |
 TSH | 2.40±1.04 | 2.40±1.00 | 0.967 |
 TgAb | 69.21±112.28 | 69.92±115.80 | 0.768 |
 TPOAb | 204.36±401.47 | 189.89±387.40 | 0.084 |