Mean VR was higher for patients in the study group during the 1st week of EN (VR control group: 84.48% VR study group: 88.20%, P = 0.0002) and also at day 12 of EN (86.44% vs. 88.25% (P = 0.035). After the 2nd week of EN, VR was superior for the control group at week 3 (VR control group: 93.50% VR study group: 89.20%) and at week 4 (97.65% vs. 94.69%); this difference was not statistically significant.