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Table 1 Clinicopathological characteristics of the training and validation cohorts

From: CT-based radiomics scores predict response to neoadjuvant chemotherapy and survival in patients with gastric cancer

FactorsTraining cohort (n = 74)Validation cohort (n = 32)P value
Age (years, mean ± SD)55.15 ± 11.4354.13 ± 12.680.68
Gender  0.53
 Male4818 
 Female2614 
BMI (kg/m2)21 ± 322 ± 30.12
Preoperative T stage  0.39
 210 
 3112 
 46229 
Preoperative N status  0.99
 021 
 1–37231 
Preoperative M status  0.85
 04719 
 12713 
Postoperative T stage  0.83
 1–2116 
 3–46326 
Postoperative N status  0.06
 0358 
 1–33924 
Postoperative M status  0.90
 05324 
 1218 
Postoperative TNM stage  0.23
 033 
 161 
 2225 
 32215 
 4218 
AFP (ng/mL)9.25 ± 17.796.48 ± 8.330.40
CEA (IU/L)  0.23
 Normal5026 
 Elevated246 
CA125 (IU/L)  0.08
 Normal7329 
 Elevated13 
CA199 (IU/L)  1.00
 Normal6427 
 Elevated105 
Operative duration (min)349.46 ± 116.47359.22 ± 111.980.69
Blood transfusion (ml)347.92 ± 506.39362.50 ± 458.430.89
Total number of dissected lymph node40.81 ± 18.6744.09 ± 17.770.40
Number of positive lymph node5.27 ± 9.017.34 ± 10.420.30
Treatment response  0.25
 TRG 133 
 TRG 23414 
 TRG 32410 
 TRG 4104 
 TRG 531 
  1. Abbreviations: BMI body mass index, PS performance status, AFP alpha-fetoprotein, CEA carcinoembryonic antigen, TRG tumor regression grading