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Table 4 Comparisons of on-Tg with TgAb-negative and RAI administration

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

  On-Tg ≥ 0.2 ng/ml (N = 30) On-Tg < 0.2 ng/ml (N = 13) t/χ2 P
Age, yrs 47.2 ± 14.5 38.0 ± 14.2 − 1.917 0.062
Sex (male) 12 4 0.054 0.817
BMI 23.4 ± 3.5 22.9 ± 3.3 − 0.417 0.679
NG 13 6 0.029 0.864
HD 4 1  < 0.001 0.990
Hypertension 3 1  < 0.001 1.000
Diabetes 1 1 0.518
Hyperthyroidism 2 0 1.000
Tumor size (primary), mm 22.6 ± 14.0 19.9.0 ± 11.8 − 0.594 0.556
Multifocality (primary) 2 5 4.597 0.032*
Bilatrality (primary) 2 2 0.110 0.740
Surgical strategy
 iCND 0 0
 bCND 6 3
 bCND + iLND 17 9 0.385
bCND + bLND 7 1 0.385
Harvested LNs 38.4 ± 20.5 36.3 ± 22.3 − 0.300 0.766
Metastatic LNs 10.9 ± 9.4 6.2 ± 7.4 − 1.588 0.120
The ratio of metastatic LNs % 29.9 ± 24.0 19.1 ± 14.4 − 1.500 0.141
Diameter of recurrent LNs 23.6 ± 15.5 16.0 ± 4.7 − 2.438 0.020*
  ≥ 25 mm 13 0 6.151 0.013*
Extranodal extension 11 6 0.341 0.559
  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