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Table 3 Comparisons of Off-Tg with TgAb-negative and RAI administration

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

  Off-Tg ≥ 1 ng/ml (N = 33) Off-Tg < 1 ng/ml (N = 10) t/χ2 P
Age, yrs 46.2 ± 14.3 38.4 ± 16.0 − 1.478 0.147
Sex (male) 13 3 0.027 0.869
BMI 23.4 ± 3.5 22.5 ± 3.3 − 0.776 0.442
NG 16 3 0.446 0.504
HD 4 1  < 0.001 1.000
Hypertension 3 1 1.000
Diabetes 1 1 0.415
Hyperthyroidism 0 2 1.000
Tumor size (primary), mm 22.7 ± 14.0 18.7 ± 11.0 − 0.829 0.412
Multifocality (primary) 3 4 3.351 0.067
Bilatrality (primary) 3 1 1.000
Surgical strategy
 iCND 0 0
 bCND 7 2
 bCND + iLND 19 7 0.645
 bCND + bLND 7 1 0.645
Harvested LNs 37.6 ± 20.8 38.2 ± 21.8 0.074 0.941
Metastatic LNs 10.3 ± 9.2 6.8 ± 8.2 − 1.079 0.287
The ratio of metastatic LNs % 29.8 ± 23.6 16.3 ± 10.7 − 1.744 0.089
Diameter of recurrent LNs 23.0 ± 15.0 15.6 ± 4.7 − 2.472 0.018*
  ≥ 25 mm 13 0 3.933 0.047*
Extranodal extension 11 6 1.304 0.254
  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