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. Author manuscript; available in PMC: 2010 Nov 27.
Published in final edited form as: N Engl J Med. 2010 May 16;362(21):1959–1969. doi: 10.1056/NEJMoa0911781

Figure 3. Actual Median Oxygen Saturation with Oxygen Supplementation in the Two Treatment Groups.

Figure 3

The medians of the distributions were significantly different on the basis of a rank-sum test (P<0.001). The 80% level of oxygen saturation shown includes all values at or below 80%.