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Table 2 Patient characteristics

From: Machine learning-based Radiomics analysis for differentiation degree and lymphatic node metastasis of extrahepatic cholangiocarcinoma

Characteristics Training cohort Testing cohort Training cohort Testing cohort
LNM Non-LNM P LNM Non-LNM P High Medium-low P High Medium-low P
Sex    0.823    0.180    0.502    0.655
Male 12 29   2 11   21 22   2 9  
Female 11 28   2 5   11 26   2 7  
Age (years) 53.4 ± 11.0 57.7 ± 9.7 0.092 53.8 ± 12.0 60.8 ± 7.7 0.159 56.6 ± 7.7 57.2 ± 11.9 0.814 62.8 ± 9.3 56.0 ± 7.8 0.151
Lesion size (cm) 1.9 ± 0.9 1.3 ± 0.8 0.008 1.6 ± 0.3 1.2 ± 0.5 0.154 1.4 ± 1.0 1.5 ± 7.6 0.443 1.1 ± 0.4 1.4 ± 0.5 0.254
  1. LNM, lymph node metastases
  2. Lesion size was defined as the maximum diameter on transverse images
  3. The values of age and lesion size were expressed as mean ± SD
  4. A two-sided P value < 0.05 was considered significant