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Table 1 Baseline clinicopathologic characteristics of 1773 PTC patients

From: PTC located in the upper pole is more prone to lateral lymph node metastasis and skip metastasis

  Mean + SD   Mean + SD
Age (years) 42.1 ± 12.4 Number of CLNMs 2.6 ± 3.3
Size (cm) 1.5 ± 1.0 Number of LLNM 1.7 ± 2.9
Sex   CLNMs  
 Female 1260 (71.1%) No 576 (32.5%)
 Male 513 (28.9%) Yes 1197 (67.5%)
Age   LLNM  
 < = 55 1289 (84.9%) No 948 (53.5%)
 > 55 230 (15.1%) Yes 825 (46.5%)
Size (cm)   Level II/III  
 ≤ 1 862 (48.6%) No 1089 (61.4%)
 1~2 624 (35.2%) Yes 684 (38.6%)
 > 2 287 (16.2%) Level IV  
Location   No 1399 (78.9%)
 Upper 624 (35.2%) Yes 374 (21.1%)
 Non-upper 1149 (64.8%) pNx  
ETE   pN0 437 (24.6%)
 No 1398 (78.8%) pN1 1336 (75.4%)
 Yes 375 (21.2%)   
Multifocality   Hashimoto  
 No 1461 (82.4%) No 1526 (86.1%)
 Yes 312 (17.6%) Yes 247 (13.9%)
  1. ETE extrathyroidal extension, CLNM central lymph node metastasis, LLNM lateral lymph node metastasis, pN0 pathologic node-negative, pN1 pathologic node-positive