Changes in TG level before and after PEX Index Times of PEX TG before PEX (mmol / l) X SD TG after PEX (mmol / l) X SD p 1st PEX (n = 83) 31, 87 27, 93 9, 30 5, 07 <0, 05 2nd PEX (n = 8) 20, 55 10, 23 9, 71 5, 22 <0, 05 3rd PEX (n = 1) 16, 11 7, 31 - Comments: TG concentration changed significantly after PEX, after the 3rd PEX, TG concentration decreased from 31.87 mmol / l to 7.31 mmol / l (down equivalent to 77%).