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Table 1 Clinicopathological features among the three groups

From: Is the rate of postoperative complications following laparoscopy-assisted gastrectomy higher in elderly patients than in younger patients?

  Group 1 (n = 672) Group 2 (n = 285) Group 3 (n = 98) P value
Age (year) * 51.3 ± 8.9 69.3 ± 2.9 77.6 ± 2.6 <0.001
Gender (%)     0.203
Male 398 (59.2) 186 (65.3) 58 (59.2)  
Female 274 (40.8) 99 (34.7) 40 (40.8)  
BMI (kg/m 2 ) * 23.5 ± 2.8 23.2 ± 3.0 23.0 ± 3.2 0.253
Comorbidity (number,%) 171 (25.4) 141 (49.5) 66 (67.3) <0.001
Hypertension** 105 43 24  
Diabetes** 46 25 6  
Heart disease** 20 10 3  
Pulmonary disease** 10 12 2  
Liver disease** 28 6 3  
Kidney disease** 2 1 0  
Others 11 8 4  
Size of main lesion (mm) * 2.8 ± 1.9 2.6 ± 1.6 3.0 ± 2.2 0.088
Histologic type     <0.001
Well differentiated 129 98 26  
Moderately differentiated 192 103 37  
Poorly differentiated 253 71 26  
Signet ring cell 82 5 2  
Other 16 8 7  
Tumor location     0.283
Upper 39 17 5  
Middle 211 79 21  
Lower 422 189 72  
T stage *** (%)     0.032
EGC 538 (80.1) 232 (81.4) 68 (69.4)  
AGC 134 (19.9) 53 (18.6) 30 (30.6)  
N stage ***     0.260
N0 573 249 79  
N1–N3 99 36 19  
Stage ***     0.084
IA 534 228 67  
IB 41 22 11  
IIA 32 18 9  
IIB 25 11 5  
IIIA 14 4 4  
IIIB 20 2 2  
IIIC 6 0 0  
  1. *All values are the means and standard deviations; **Combined number; ***Based on the AJCC 7th TNM classification.
  2. Group 1: <65 years, young age; Group 2: 65–74 years, elderly age; Group 3: ≥75 years, very elderly age.