|   | 
        ETSevo 1% (n = 23) | 
        ETSevo 1.5% (n = 24) | 
        ETSevo 2% (n = 23) | 
       
      
        | Age (years) | 
        45.6 ± 14.7 | 
        48.5 ± 16.0 | 
        50.1 ± 13.1 | 
       
      
        | Height (cm) | 
        163.7 ± 8.3 | 
        160.8 ± 8.8 | 
        160.0 ± 9.1 | 
       
      
        | Weight (kg) | 
        61.0 ± 9.3 | 
        57.3 ± 8.3 | 
        58.4 ± 9.7 | 
       
      
        | Body mass index (kg/m2)  | 
        22.8 ± 3.6 | 
        22.1 ± 2.9 | 
        22.8 ± 2.9 | 
       
      
        | Gender (male/female) | 
        9/14 | 
        9/15 | 
        6/17 | 
       
      
        | ASA PS (I/II) | 
        15/8 | 
        13/11 | 
        13/10 | 
       
      
        | Frequency of using ephedrine (use/no use) | 
        6/17 | 
        6/18 | 
        12/11 | 
       
      
        | Frequency of using atropine (use/no use) | 
        0/23 | 
        0/24 | 
        0/23 | 
       
      
        | Data are expressed as mean ± standard deviation. ASA PS:    American Society of Anesthesiologist physical status | 
       
      |