| 
        Group    1 | 
        Group    2 | 
        Group    3 | 
        Group    4 | 
        P | 
       
      
        |   | 
        (n =18) | 
        (n = 20) | 
        (n =19) | 
        (n =21) | 
          | 
       
      
        | PACU    stay1 | 
        33.3    ± 4.9 | 
        27.25    ± 4.3 | 
        41.32    ± 9.9 | 
        30.18    ± 4.6 | 
        0.45# | 
       
      
        | Nausea    at PACU2 | 
          | 
          | 
          | 
          | 
          | 
       
      
        | Yes | 
        6    (33.3%) | 
        7(35.0%) | 
        4    (21.1%) | 
        8    (38.9%) | 
        0.68 Δ | 
       
      
        |  No | 
        12    (66.6%) | 
        13    (65%) | 
        15    (78.9%) | 
        13    (62.9%) | 
          | 
       
      
        | Vomiting    at PACU2 | 
          | 
          | 
          | 
          | 
          | 
       
      
        | Yes  | 
        2    (11.1%) | 
        1    (5%) | 
        0    (0.0%) | 
        3    (14.29%) | 
          | 
       
      
        | No | 
        16    (88.9%) | 
        19    (95.0%) | 
        19    (100%) | 
        18    (85.71%) | 
        0.40 Δ | 
       
      
        | Sedation    in thePACU2 | 
          | 
          | 
          | 
          | 
          | 
       
      
        |  Grade 1 | 
        16    (88.9%) | 
        19    (95%) | 
        18    (94.7%) | 
        20    (95.2%) | 
          | 
       
      
        |  Grade 2 | 
        2    (11.1%) | 
        1    (5.0%) | 
        1    (5.3%) | 
        1    (4.8%) | 
        0.83 Δ | 
       
      
        |  Grade 3 | 
        0    (0.0%) | 
        0    (0.0%) | 
        0    (0.0%) | 
        0    (0%) | 
          | 
       
      
        | Satisfied    with anesthesia2 | 
        16    (88.9%) | 
        20    (100%) | 
        17    (89.5%) | 
        20    (95.2%) | 
        0.44 Δ | 
       
      
        | Dissatisfied    with anesthesia2 | 
        2    (11.1%) | 
        0    (0%) | 
        2    (10.5%) | 
        1    (4.8%) | 
          | 
       
      
        | Nausea    and/or vomiting at 24h2 | 
          | 
          | 
          | 
          | 
          | 
       
      
        |  Yes | 
        15    (83.3%) | 
        17    (89.5%) | 
        17    (94.4%) | 
        19    (95.0%) | 
        0.77 Δ | 
       
      
        | Not | 
        3    (16.7%) | 
        2    (10.5%) | 
        1    (5.6%) | 
        1    (5.0%) | 
          | 
       
      
        | Satisfied    with analgesia | 
        16    (88%) | 
        20    (100%) | 
        18    (100%) | 
        20    (100%) | 
        0.69 Δ | 
       
      
        | Dissatisfied    with analgesia | 
        2    (11.1%) | 
        0    (0%) | 
        0    (0%) | 
        0    (0%) | 
          | 
       
      
        | Bad    dreams2 | 
          | 
          | 
          | 
          | 
          | 
       
      
        | Yes | 
        3    (16.7%) | 
        0    (0%) | 
        2    (11.1%) | 
        0    (0%) | 
        0.06 Δ | 
       
      
        |  No | 
        15    (83.3%) | 
        19    (100%) | 
        16    (88.9%) | 
        20    (100%) | 
          | 
       
     
      1 Values presented as means ± SD. 2 Values presented as absolute and relative frequencies. 
    # P values according to the Kruskal-Wallis test. Δ P values according to the chi-square test. |