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Table 1 Comparison of clinicopathologic characteristics in two groups of patients with mid-low rectal cancer

From: Effect of preoperative injection of carbon nanoparticle suspension on the outcomes of selected patients with mid-low rectal cancer

Parameter Experimental
group (n = 35)
Control
group (n = 52)
P value
Sex    0.968
 Men 16 24  
 Women 19 28  
Age (years)a 60.0 ± 10.7 58.9 ± 9.4 0.631
BMI (kg/m2)a 23.6 ± 2.9 23.2 ± 2.8 0.505
ASA score    0.448
 I 4 3  
 II 28 41  
 III 3 8  
Concomitant diseases    0.948
 Yes 11 16  
 No 24 36  
Tumor size (cm)a 4.9 ± 2.0 4.6 ± 2.3 0.619
Distance from anal verge (cm)a 5.6 ± 1.9 5.3 ± 1.7 0.549
Operation type (cases)    0.459
 Anterior resection 28 38  
 Abdominoperineal resection 7 14  
TNM stage    0.896
 I 3 4  
 II 6 11  
 III 26 37  
Tumor differentiation    0.602
 Well 2 1  
 Moderate 29 46  
 Poor 4 5  
Pathologic type    0.721
 Adenocarcinoma 33 48  
 Mucinous adenocarcinoma 2 4  
  1. Tumor size is the largest diameter under macroscopic examination
  2. BMI body mass index, ASA American society of anesthesiologists
  3. a These values are presented as mean ± standard deviation; other values are presented as the number of patients