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Table 2 Comparisons of maximum uTg with TgAb-negative

From: Predictors of thyroglobulin in the lymph nodes recurrence of papillary thyroid carcinoma undergoing total thyroidectomy

  uTg ≥ 0.2 ng/ml (N = 39) uTg < 0.2 ng/ml (N = 13) t/χ2 P
Age, yrs 47.2 ± 14.1 39.2 ± 12.1 − 1.827 0.074
Sex (male) 15 3 0.453 0.501
BMI 23.7 ± 3.9 22.5 ± 3.8 − 0.938 0.353
NG 16 6 0.105 0.746
HD 5 1  < 0.001 1.000
Hypertension 4 2  < 0.001 1.000
Diabetes 2 1 1.000
Hyperthyroidism 3 2 0.074 0.786
Tumor size (primary), mm 21.7 ± 13.3 18.9 ± 10.4 − 0.682 0.498
Multifocality (primary) 4 5 3.628 0.057
Bilatrality (primary) 4 2  < 0.001 1.000
Surgical strategy
 iCND 2 1 1.000
 bCND 11 4 1.000
 bCND + iLND 20 8 0.403
 bCND + bLND 8 1 0.403
Harvested LNs 32.7 ± 21.6 40.5 ± 19.7 1.148 0.256
Metastatic LNs 9.6 ± 8.8 5.9 ± 7.3 − 1.356 0.181
The ratio of metastatic LNs % 34.1 ± 25.7 14.4 ± 10.5 − 3.900 0.001*
Diameter of recurrent LNs 21.1 ± 14.7 14.6 ± 5.6 − 2.279 0.027*
  ≥ 25 mm 13 0 5.778 0.023*
Extranodal extension 15 5  < 0.001 1.000
  1. BMI Body Mass Index, HD Hashimoto's disease, NG nodular goiter, iCND ipsilateral central neck dissection, bCND bilateral central neck dissection, iLND ipsilateral lateral neck dissection, bLND bilateral lateral neck dissection, LNs lymph nodes
  2. *Means significantly statistical differences