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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Crit Care Med. 2014 Jul;42(7):1610–1618. doi: 10.1097/CCM.0000000000000322

Figure 1.

Figure 1

Flow diagram of the study cohort. aIncluded any patient with a PaO2/FIO2 ratio <100 at any time during the first ICU admission; bMedian follow-up duration: 449 days (IQR: 13, 1138); cIncludes subjects that neither appeared in the Washington State Death Registry nor died in the hospital AND had an address of residence outside Washington State.