| 
      
        |  | Group I | Group II | Significant level |  
        | SDANN | 35.8 ± 28.3 | 42.57 ± 41.8 | 36 |  
        | SDNN | 127.35 ± 24.5 | 101.96  ± 30.65 | 0.0001* |  
        | SDNN INDEX | 101.5 ± 67.8 | 113.4 ± 75 | 0.42 |  
        | pNN50 | 13.94 ± 7.8 | 15.01 ± 11.5 | 0.6 |  
        | RMSSD | 89.23 ± 29.7 | 84.1 ± 35.64 | 0.4 |  
        | VLF | 1107.5 ± 487 | 1298.38 ± 787.2 | 0.16 |  
        | LF | 999.2 ± 191.3 | 959.7 ± 350.9 | 0.5 |  
        | HF | 951.1 ± 313.25 | 937.58 ± 441.7 | 0.8 |  |