Document Classification

Section Type: RESULTS

Text: As compared with the liberal strategy, the conservative strategy improved the oxygenation index ([mean airway pressure x the ratio of the fraction of inspired oxygen to the partial pressure of arterial oxygen] x100) and the lung injury score and increased the number of ventilator-free days (14. 6 + / -0. 5 vs. 12. 1 + / -0. 5, P < 0. 001) and days not spent in the intensive care unit (13. 4 + / -0. 4 vs. 11. 2 + / -0. 4, P < 0. 001) during the first 28 days but did not increase the incidence or prevalence of shock during the study or the use of dialysis during the first 60 days (10 percent vs. 14 percent, P = 0. 06).