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Table 1 Comparison of clinico-pathological characteristics among the 4 groups of treatment modality

From: Survival after chemotherapy and/or radiotherapy versus self-expanding metal stent insertion in the setting of inoperable esophageal cancer: a case-control study

Variable (continuous)   Kruskal-Wallis ANOVA by Ranks test (Median test) Mean ± SD P-value
Age A SEMS
B Chemo
C Radiation
D C/R
69.57 ± 10.08 P = 0.017 (SEMS vs. C/R* P = 0.013)
   67.00 ± 4.30  
   66.44 ± 8.57  
   61.05 ± 9.74  
BMI   24.87 ± 4.27 P = 0.466
   25.91 ± 5.65  
   25.70 ± 4.00  
   24.81 ± 5.11  
Vital capacity (VC)   3.54 ± 1.08 P = 0.287
   3.75 ± 0.93  
   2.75 ± 1.28  
   3.78 ± 0.95  
FEV 1   32.53 ± 33.53 P = 0.306
   41.29 ± 33.42  
   38.86 ± 30.13  
   46.98 ± 28.11  
Variable (categorical) Distribution of variable categories among groups of therapy Spearman Rank Order Correlations P -value
cTNM-classification   -0.124360 0.165
ASA-classification   -0.017661 0.876
Nutrition   0.166002 0.244
Smoking   0.080980 0.387
Alcohol   0.082105 0.380
Child-Pugh score   0.033203 0.724
Pulmonary status   0.226517 0.013
Cardiovascular status   -0.226854 0.013
Diabetes   -0.043337 0.642
Secondary carcinoma   0.095611 0.286
Gender   -0.146058 0.095
Histology   -0.348704 0.001
Localization   -0.259496 0.002
Contraindications for surgery   0.032170 0.715
Causes of inoperability   0.128822 0.142
Site of metastases   -0.060909 0.566
Type of metastases   0.224707 0.032
  1. SD: Standard deviation; SEMS: Self-expandable metallic stents; C/R*: Chemo-Radiotherapy; BMI: body mass index; ASA: American Society of Anesthesiologists classification; FEV 1 : Forced expiratory volume in 1 s