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Table 1 Patient characteristics

From: Image-guided microwave ablation of hepatocellular carcinoma (≤5.0 cm): is MR guidance more effective than CT guidance?

Characteristics CT-guided (n = 47) MR-guided (n = 54) P value
Age (y)† 55.8 ± 8.9 53.2 ± 6.5 0.367
Sex    0.176*
 Male 31 43  
 Female 16 11  
ECOG performance status    0.230*
 0 29 26  
 1 18 28  
Etiology    0.086§
 Hepatitis B 32 44  
 Hepatitis C 4 6  
 Alcohol 9 2  
 Unknown 2 2  
Child–Pugh class    0.217*
 A 33 31  
 B 14 23  
Location of tumor    0.245*
 Typical locations 23 33  
 Hepatic dome 12 7  
 Close to the heart/diaphragm/hepatic hilum 12 14  
a-Fetoprotein level (ng/mL)    0.407*
  < 200 28 37  
  > 200 19 17  
Tumor diameter (cm)    0.163*
 <3 28 24  
  ≥ 3,< 5 19 30  
Tumor number    0.686*
 Single (1) 26 33  
 2–3 21 21  
Duration of ablation (min) 11.2 ± 5.4 9.7 ± 3.2 0.003
Generator power (watts) 57.3 ± 8.5 54.5 ± 6.3 0.047
  1. Note.—Unless indicated, data are numbers of patients, and numbers in parentheses are percentages. ECOG Eastern Cooperative Oncology Group. *Pearson χ2 test was used. †Data are mean ± standard deviation. ‡Independent-samples t test was used. §Fisher exact test was used
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