GSTM1 and infection: Also, many other studies have also shown that Omega-3 FA decreases hospital stay [6,21-24]. The decrease in the length of postoperative hospital stay in the study group may be a reflection of the improved nutritional status (increased Hb, serum total proteins, serum albumin, and weight), improved immune status (increased CD 4 count, decreased CRP), and less postoperative infection.