A randomized controlled trial of preoperative oral supplementation with a specialized diet in patients with gastrointestinal cancer

Gastroenterology. 2002 Jun;122(7):1763-70. doi: 10.1053/gast.2002.33587.


Background & aims: Perioperative nutrition with specialized enteral diets improves outcome when compared with standard formulas. A post-hoc analysis suggested preoperative administration as the most important period. Thus, we designed a study to understand prospectively whether preoperative supplementation could be as efficacious as the perioperative approach and superior to a conventional treatment (no artificial nutrition) in reducing postoperative infections and length of hospital stay.

Methods: A total of 305 patients with preoperative weight loss <10% and cancer of the gastrointestinal tract were randomized to receive the following: (1) oral supplementation for 5 days before surgery with 1 L/day of a formula enriched with arginine, omega-3 fatty acids, and RNA, with no nutritional support given after surgery (preoperative group, n = 102); (2) the same preoperative treatment plus postoperative jejunal infusion with the same enriched formula (perioperative group, n = 101); and (3) no artificial nutrition before and after surgery (conventional group; n = 102).

Results: The 3 groups were comparable for all baseline and surgical characteristics. Intention-to-treat analysis showed a 13.7% incidence of postoperative infections in the preoperative group, 15.8% in the perioperative group, and 30.4% in the conventional group (P = 0.006 vs. preoperative; P = 0.02 vs. perioperative). Length of hospital stay was 11.6 +/- 4.7 days in the preoperative group, 12.2 +/- 4.1 days in the perioperative group, and 14.0 +/- 7.7 days in the conventional group (P = 0.008 vs. preoperative and P = 0.03 vs. perioperative).

Conclusions: Preoperative supplementation is as effective as perioperative administration in improving outcome. Both strategies seem superior to the conventional approach.

Publication types

  • Clinical Trial
  • Comparative Study
  • Randomized Controlled Trial

MeSH terms

  • Aged
  • Female
  • Food, Formulated*
  • Gastrointestinal Neoplasms / surgery*
  • Humans
  • Incidence
  • Length of Stay
  • Male
  • Middle Aged
  • Postoperative Care
  • Preoperative Care*
  • Surgical Wound Infection / epidemiology
  • Surgical Wound Infection / prevention & control