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Table 2 Relationship between serum fibrinogen levels and clinical characteristics in the training and testing sets of PTC patients

From: Using a nomogram based on preoperative serum fibrinogen levels to predict recurrence of papillary thyroid carcinoma

  Training set Testing set
Serum fibrinogen level Serum fibrinogen level
Factor Low High p Low High p
All patients 402 12   575 34  
Age (years)    0.017    0.693
  ≤45 239 3   328 18  
  >45 163 9   247 16  
Age (years)    0.046    0.378
  ≤55 349 8   474 26  
  >55 53 4   101 8  
Gender    0.441    0.394
  Female 295 10   400 26  
  Male 107 2   175 8  
Postoperative RAI    0.683    0.884
  Yes 221 7   324 20  
  No 181 5   251 14  
Race    0.215    0.906
  Han 392 11   560 33  
  Other 10 1   15 1  
BRAF mutation    0.642    0.073
  Positive 49 2   125 3  
  Negative 74 3   84 4  
  Unknown 279 7   366 27  
T classification    0.001    0.001
 T1 160 0   189 8  
 T2 8 3   12 1  
 T3 181 5   279 15  
 T4 53 4   95 10  
PTC nodule number    0.001    <0.001
  Single 345 6   509 22  
  Multiple 57 6   66 12  
Capsule invasion    0.068    0.036
  Presence 194 10   266 22  
  Absence 208 2   309 12  
Strap muscles invasion    <0.001    0.013
  Presence 40 6   68 9  
  Absence 362 6   507 25  
RLN invasion    <0.001    0.001
  Presence 9 2   44 8  
  Absence 393 10   531 26  
Esophagus invasion    <0.001    0.009
  Presence 6 2   18 4  
  Absence 396 10   557 30  
Trachea invasion    <0.001    <0.001
 Presence 3 3   11 5  
  Absence 399 9   564 29  
N classification    0.186    0.604
  N0 193 3   279 14  
  N1a 149 7   183 14  
  N1b 60 2   113 6  
M classification    <0.001    <0.001
  M0 400 10   569 30  
  M1 2 2   6 4  
PTC recurrence    0.002    0.002
  No 373 8   547 28  
  Yes 29 4   28 6  
AJCC stage    0.004    0.047
  I 268 4   392 20  
  II 62 2   100 3  
  III 70 4   77 7  
  IV 2 2   6 4