Supplementation with vitamin A was also associated with a significant reduction in the duration ofintubation ( @ + / - @ days vitamin A supplemented group vs. @ + / - @ days control group , p = @ ) , days on oxygen therapy ( @ + / - @ days vitamin A supplemented group vs. @ + / - @ days control group , p = @ ) and length of hospital stay ( @ + / - @ days vitamin A supplemented group vs. @ + / - @ days control group , p = @ ) .