Group-R showed significantly higher bispectral-index values during colonoscopy ( 92 [ 85-96 ] vs 84 [ 80-87 ] , P = 0.001 ) ; a higher incidence of recall of explanations given during and after colonoscopy ( 100 vs 48 % and 96 vs 52 % , both P < 0.001 ) ; and a lower distress score ( visual analog scale 30/100 vs 37/100mm , P = 0.002 ) , than did group-MM .