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Table 2 Comparisons of BIS data by clinical conditions

From: Comparison of Bispectral Index™ values during the flotation restricted environmental stimulation technique and results for stage I sleep: a prospective pilot investigation

  BIS p value %difference Cohen’s d
Awake state 96.6 ± 1.7    
Float session-1 84.3 ± 4.5 < 0.0001 12.7 3.6
Awake state 96.6 ± 1.7    
Float session-2 82.3 ± 4.1 < 0.0001 14.8 4.6
Relaxation induction 82.8 ± 6.8    
Float session-1 84.3 ± 4.5 0.1548 1.8 0.3
Relaxation induction 82.8 ± 6.8    
Float session-2 82.3 ± 4.1 0.6256 0.5 0.1
Sleep stage I 86.0 ± 3.5    
Float session-1 84.3 ± 4.5 0.0292 1.9 0.4
Sleep stage I 86.0 ± 3.5    
Float session-2 82.3 ± 4.1 < 0.0001 4.3 1.0
Float session-1 84.3 ± 4.5    
Sleep stage II 66.2 ± 4.0 < 0.0001 21.5 4.3
Float session-2 82.3 ± 4.1    
Sleep stage II 66.2 ± 4.0 < 0.0001 19.6 4.0
Float session-1 84.3 ± 4.5    
Sleep stages III–IV 45.1 ± 8.9 < 0.0001 46.5 5.6
Float session-2 82.3 ± 4.1    
Sleep stages III–IV 45.1 ± 8.9 < 0.0001 45.2 5.4
  1. BIS Bispectral Index™